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Uncle Eric Books



Sir Cumference Math Adventure Series
Math Texts by Harold Jacobs
Key to...series
Miquon Math Materials
Cuisenaire Rods
Murderous Maths
Uncle Eric Books

Math & Music

Math & Music by Wildridge Education

Math & Music is an interdisciplinary program emphasizing the practical value of fundamental math skills by relating these skills to the basic elements of music. The program wll help students build the mathematical foundation necessary to understand algebra and appreciate diverse musical forms.

The program combines mathematics, music, physics, and history. Click here for more information and ordering.

50 Mathematical Puzzles and Problems

Gilles Cohen (Editor)
Grade 6–College

More than a decade's worth of puzzles and problems from the International Championship of Mathematics are found in this three-volume set. The problems are organized by mathematical themes—geometry and symmetry, arithmetic and number theory, logic and algorithmic process.

Created for all puzzle and game lovers and learners, this engaging series of problems relies more on reasoning than knowledge. It provides hours of investigative problem solving and will reinforce and integrate the fundamental themes of traditional mathematics with discrete mathematics.

Each book of 50 problems is laid out with one problem per page. Full solutions are provided.

The Green Collection (Grades 6–12) is accessible to many middle school students while still challenging enough for high school students. It introduces classic problems like the four-color map, the division of irregular areas into equal parts, and magic squares and number mazes

Paper, 86 pages. 8.8"x6.8"x.3"
#4987XX $13.95 $12.99 Out of print and no longer available.

The Orange Collection (Grades 9–12) is the intermediate set and will challenge most high-school-age learners. Students divide polygons into tilings of congruent shapes; they encounter knots, chains, and networks; they decipher messages and break codes. A few solutions are facilitated with algebra and trigonometry.

Paper, 86 pages. 8.8"x6.8"x.3"

#4994X $13.95   Out of print; limited quantities available.

The Red Collection (Grade 9–College) is the most challenging set, involving distance, vectors, transformations, systems of equations, series, powers, and number theory. Problems are solved with compass and straightedge constructions, trigonometry, the Pythagorean theorem, synthetic division, and a great deal of ingenuity.

Paper, 86 pages. 8.8"x6.8"x.3"

#5007 $13.95  Out of print; limited quantities available.

Africa Counts: Number and Pattern in African Cultures, 3rd edition - by Claudia Zaslavsky. This fascinating study of mathematical thinking among sub-Saharan African peoples covers counting in words and in gestures; measuring time, distance, weight, and other quantities; manipulating money and keeping accounts; number systems; patterns in music, poetry, art, and architecture; and number magic and taboos. African games such as mankala and elaborate versions of tic-tac-toe show how complex this thinking can be. This third edition is updated with an introduction covering two decades of new research in the ethnomathematics of Africa.

Claudia Zaslavsky was a mathematics teacher and the author of Math Games and Activities from Around the World, More Math Games and Activities from Around the World and other books.

#3505 $18.95

Algebra Survival Guide A self-teaching guide that is packaged in a question-and-answer format, this book will help illuminate algebraic concepts in a clear, non-threatening way. It can be used to supplement an existing Algebra 1 text, as a review book (such as studying for the SAT) or all by itself.

I've heard positive comments from math-phobic teens who finally "get" algebra after using this book.

#1381 $19.95 $17.99

Algebra Survival Guide Workbook The workbook provides 58 reproducible pages of practice problems with all the answers included. It can be used with any algebra textbook to practice specific concepts, but it works best when used in conjunction with the Algebra Survival Guide. When used together, the workbook and text can be used as a complete Algebra I curriculum (especially for learners who don't like traditional textbooks).

#1373 $9.95

Algebra Unplugged
by Kenn Amdahl & Jim Loats. One of our customers special ordered this book for her teenager and reported back to us that it really helped her daughter begin to understand algebra. Written with the idea that many people who learn best by reading and understanding concepts are often confused by traditional "exercise-intensive books," this book focuses attention on the concepts.

This is an excellent book for anyone intimidated by algebraic formulas but who likes to read. Plain talk and realistic examples help the concepts make sense. After reading this book, when you go on to practice algebra by doing exercises (found perhaps in the Jacobs Algebra book), you'll find those exercises will now make more sense.

Paper, 258 pages.

#1575 $14.95

Base Ten Blocks Activity Book
- Providing activities and exercises for use with base ten block materials, this book explores number operations, place value, area, volume and fractions. You need to provide your own base ten block material for use with this book.

Paper, 96 pages.

#5478 $9.95 $4.99 Super Special!

Calculus for Cats
by Kenn Amdahl & Jim Loats. We were at a homeschooling conference when one of our customers (who also just happens to be a math consultant!) came up to us with a copy of this book in her hands and told us we just had to add it to our catalog. She knew that we liked Algebra Unplugged by this same duo and thought we would like this title as well. She was right!

After reading this book, I have to say they've done it again. Combine a guy who loves words (but distrusts math) and a guy who loves math (but distrusts words), and the unlikely collaboration produces a perfect book for the beginner or the hopelessly lost. Without doing a single problem, you will get the basic concepts and vocabulary of Calculus and may find that the subject is no longer as mysterious or terrifying as it once was. The use of humor, analogy, and concrete examples makes this a much easier read than the typical exercise-intensive textbook. You may find yourself needing to re-read some sections to fully grasp the concepts (it is still calculus after all!), but if you are not mathematically inclined, this may be your best bet for ever understanding calculus.

Paper, 179 pages

#155X $14.95

Card Game Roundup: Play Your Way to Math Success
(Grades 3-5) by Josh Rappaport - Enhance math learning with fun games that teach math skills and concepts. With Wild West themes, these games capture children's imaginations, then take them for an exciting ride along the "concept range."

In "Annie Oakley," children learn about measurement and data analysis. In "Mysterious Bandits," children solve for variables in addition and subtraction problems. And in "Land Grab," they learn how to sort objects into the sections of a Venn Diagram. There are 17 games in all.

Paper, 96 pages.

#1306X $12.95

Also available:

Since he was a kitten, the author's cat, Penrose, has gotten into her papers, puzzles and sometimes even appeared to be turning pages in her various math books! He is the inspiration for the following books.

Penrose, no ordinary cat, takes kids on adventurous tours of mathematical concepts and characters with his books. The stories help make abstract concepts more understandable and fun to learn. The activities are enjoyable and relatively simple to do (solutions are in the back of the book). Each chapter is self-contained so that you can randomly pick any math game, idea,
or puzzle and learn about it without having to read the preceding chapters first. Ages 9-12.

The Adventures of Penrose the Mathematical Cat by Theoni Pappas.

Penrose discovers pancake world
Penrose meets the fractal dragon
Penrose meets the Fibonacci rabbit
Penrose watches a tangram egg hatch
The polyhedra connect with Penrose
and MANY more fun and informative tales

Paper, 114 pages

#0142 $10.95

The Further Adventures of Penrose the Mathematical Cat by Theoni Pappas. 

Penrose gets the prime numbers
Penrose tells a snail about spirals
He shares his solitaire game puzzles
Penrose shares his favorite math magic tricks

and MANY more fun and informative tales

Paper, 117 pages.

#0320 $10.95

Grandfather Tang's Story
by Ann Tompert. Grandfather Tang tells Little Soo a story about two fox fairies, Chou and Wu Ling, who can change their shapes. They try to outdo each other by changing into various animals. For instance, when Wu Ling changes himself into a rabbit, Chou changes into a dog and chases him. Every time Wu Ling changes into a different animal, Chou changes into one that can chase him. Their game goes further than they imagine and they come close to losing their friendship.

Besides showing the value of friendships, diagrams throughout the book encourage readers to create their own tangram shapes. Illustrated with lovely watercolor paintings. Readers can make their own tangrams to accompany the book or you can purchase a set of our tangrams.

Paper, 34 pages.

#5581 $6.99

Mandelbrot's World of Fractals DVD - Professor Benoit Mandelbrot, the innovator of fractal mathematics, brings us a novel look at fractals in Mandelbrot's World of Fractals. This DVD makes basic concepts of fractals accessible to learners and shows creative examples of fractals in the real world - not only in ferns and coastlines, but also in your kitchen!

This DVD is divided into ten independent modules and will enliven math learning.

The total running time is 62 minutes. The part intended for students is 52 minutes. Ages 14+.

#7933 $26.95 $17.99

Games for Math: Playful Ways to Help Your Child Learn Math - from Kindergarten to Third Grade
by Peggy Kaye. Children learn math through playing over 60 fun and inexpensive games using everyday material found in the home.

Paper, 236 pages.

See also Kaye's other books, Games for Reading and Games for Writing.

#5103 $16.95

Exploring Geometry with The Geometer's Sketchpad ®, Version 4 edition (CD-Rom and Book) (Key Curriculum) by Dan Bennett - This popular curriculum module for The Geometer's Sketchpad® guides students as they construct and manipulate geometric figures and discover relationships and theorems on their own.

Exploring Geometry features more than 100 activities covering virtually every concept studied in high school geometry and has ideas for projects, open-ended problems, and long-term assignments.

Exploring Geometry includes: Extensions to the main activities, reproducible blackline masters, CD in Windows® and Macintosh® formats containing all the pre-made sketches required in the activities, the demonstration sketches, and additional resources

Paper, 303 pages. Book and CD-Rom.

This subject-specific activity book requires The Geometry Sketchpad software.

#5814 $49.95 $39.99

Thirteen Books of Euclid's Elements 3-Volume Set (Second Edition Unabridged, Dover Publication) translated with introduction and commentary by Sir Thomas L. Heath -
This magnificent set includes all 13 books of the Elements plus critical apparatus analyzing each definition, postulate, and proposition in great detail.

Covers textual and linguistic matters; mathematical analyses of Euclid's ideas; classical, medieval, Renaissance and modern commentators; refutations, supports, extrapolations, reinterpretations and historical notes.

Paper, 7.8"x5.4"x.9" each. 3-book set.

#FUN102 $44.85 $26.99
40% off - only one set available.

Grandfather Tang's Story
by Ann Tompert. Grandfather Tang tells Little Soo a story about two fox fairies, Chou and Wu Ling, who can change their shapes. They try to outdo each other by changing into various animals. For instance, when Wu Ling changes himself into a rabbit, Chou changes into a dog and chases him. Every time Wu Ling changes into a different animal, Chou changes into one that can chase him. Their game goes further than they imagine and they come close to losing their friendship.

Besides showing the value of friendships, diagrams throughout the book encourage readers to create their own tangram shapes. Illustrated with lovely watercolor paintings. Readers can make their own tangrams to accompany the book or you can purchase a set of our tangrams.

Paper, 34 pages.

#5581 $6.99

Grocery Cart Math
by Jaye Hansen - Make grocery store trips a part of your learning day, with Grocery Cart Math. Learn basic math skills through regular trips to the grocery store. Each section contains specific activities to do at the store, at home, and questions to discuss.

Paper, 46 pages. Ages 8-10. Large print.

#2677 $10.00

Inversions: A Catalog of Calligraphic Cartwheels by Scott Kim - "Inversions" are words that read the same upside down or in a mirror. Or words cleverly hidden inside other words. Each has something to fool the eye, a special visual trick; at the same time, this imaginative catalog of challenging visual wordplay reflect the idea of symmetry, both in art and in science.

The book introduces the basic concepts of symmetry with more than 60 mind-boggling lettering designs by Scott Kim, whom Isaac Asimov called "the Escher of the alphabet." Each word in Inversions exhibits striking geometrical symmetry. For instance, the word mirror is written with reflectional symmetry; symmetry reads the same upside down; and infinity spirals off to infinity. The accompanying essays connect mathematics and symmetry with art, psychology, and music. One of the sections shows students how to create their own inversions.

Paper, 131 pages.

#2807 $29.95
Out of print.

Math and Science Across Cultures: Activities and Investigations from the Exploratorium by Maurice Bazin, Modesto Tamez, and the Exploratorium Teacher Institute -  From the creators of the bestselling Explorabook come innovative, hands-on math and science activities of many cultures. With instructions in this book, one can construct a Brazilian carnival instrument, play a peg solitaire game from Madagascar, or count like an Egyptian. Illustrations throughout.

Paper, 192 pages.

#5412 $26.95
One copy available.

Math Games & Activities from Around the World by Claudia Zaslavsky - Math, history, geography, art, and world cultures come together in this delightful book for kids who think math is boring. More than 70 math games, puzzles, and projects from all over of the world are included.

Learners will hone their math skills as they use geometry to design game boards and logical thinking to work out strategies or analyze the outcomes of games of chance. Activities include building a model pyramid, testing the golden ratio of the Parthenon, and working maze-like African network puzzles.

Paper, 147 pages. 11"x8 1/2"

#2871 $16.95 Out of stock; email to see if more copies have arrived.

More Math Games & Activities from Around the World by Claudia Zaslavsky - Math, history, art, and world cultures come together in this delightful book for kids, even for those who find traditional math lessons boring. More than 70 games, puzzles, and projects encourage kids to hone their math skills as they calculate, measure, and solve problems.

The games span the globe, and many have been played for thousands of years, such as three-in-a-row games like Achi from Ghana or the forbidden game of Jirig from Mongolia. Also included are imaginative board games like Lambs and Tigers from India and the Little Goat Game from Sudan, or bead and string puzzles from China, and M+bius strip puzzles from Germany.

Through compelling math play, children will gain confidence and have fun as they learn about the different ways people around the world measure, count, and use patterns and symmetry in their everyday lives.

Paper, 161 pages. Ages 9+.

#5018 $14.95

Math-A-Day: A Book of Days for Your Mathematical Year by Theoni Pappas - This entertaining book of mathematical days exercises the brain with confounding puzzles, intriguing math problems, and, of course, detailed solutions to all the conundrums.

Not a calendar - not  a reference book - but a compendium of mathematical information that will give you your math fix every day of the year.

One little feature I like is that she uses introduces a different numbering system each month. For example: January is the Mayan numbering system, March is the Chinese numbering system, and October is the Babylonian number system.

366 days of: problems or puzzles, mathematical quotes, historical or current math information. Never out of date. Use it day after day, year after year.

Paper, 256 pages.

#0207 $12.95 $9.99 One copy available.

Mathematics: From the Birth of Numbers by Jan Gullberg -  This wide-ranging survey looks at the history of mathematics from the invention of numbers and language, through the realms of arithmetic, algebra, geometry, trigonometry and calculus, to mathematical logic, set theory, topology, fractals and probability, and onwards to differential equations.

The book is intended for the general reader, and links mathematics to the humanities, linguistics, the natural sciences and technology

"Having spent the last 35 years teaching mathematics and having acquired a large library of reference books on the subject during that time. I only wish Jan Gullberg had written Mathematics: From the Birth of Numbers long ago. His writing style makes you feel as if you are a fortunate student spending time with a gifted teacher. The abundance of appropriate examples, historical illustrations, and quotations also help to enlighten and entertain the reader. The scope of the books is astonishing and I am convinced that it will serve as a valuable reference work for teachers and students for years to come." - Harold Jacobs

Hardcover, 1128 pages. 10.1"x7.2"x2.2".

#002X $50.00

Sir Cumference Math Adventure Series

Follow the adventures of Sir Cumference, his wife Lady Di of Ameter, and their son Radius as they solve mysteries by using math. Children who enjoy knights, dragons, and swords, will enjoy this setting for learning math concepts. Younger children may not "get" all of the terms, but it will be a great introduction for later learning.

Sir Cumference and All the King's Tens by Cindy Neuschwander. Sir Cumference and Lady Di planned a surprise birthday party for King Arthur, but they didn’t expect so many guests to show up. How many lunches will they need? And with more guests arriving by the minute, what about dinner? Sir Cumference and Lady Di have to figure out a quick way to count the guests to bring order to the party.

Math skill: place value.

Paper, 32 pages. Ages 8-11.

#7288 $7.95

Sir Cumference and the First Round Table
by Cindy Neuschwander- King Arthur was a good ruler, but in this math adventure he needs a good ruler. Geometry is explained with humor in Sir Cumference and the First Round Table, making it fun and accessible for beginners.

What would you do if the neighboring kingdom were threatening war? Naturally, you'd call your strongest and bravest knights together to come up with a solution. But when your conference table causes more problems than the threat of your enemy, you need expert help. Enter Sir Cumference, his wife Lady Di of Ameter, and their son Radius. With the help of the carpenter, Geo of Metry, this sharp-minded team designs the perfect table conducive to discussing the perfect peace plan.

Math skills include learning about circumference, radius and diameter.

Lots of colorful illustrations. Ages 8-11. Paper, 32 pages.

#1521 $7.95

Sir Cumference and the Dragon of Pi
by Cindy Neuschwander - When Sir Cumference turns into a dragon, Lady Di of Ameter helps him hide, while Radius searches for the cure – the magic number that is the same for all circles. A fun way to introduce the concept of pi.

Math skill: derivation of pi.

32 pages. Ages 8-11.

Paper: #1644 $7.95

Hardcover: #1668 $16.95 $12.99 (One copy available).

Celebrate Pi Day on March 14th (3.14)!  I surprised my family this year with two pies that I decorated with the Pi symbol, and they got a huge kick out of it.

Sir Cumference and the Great Knight of Angleland
by Cindy Neuschwander - Radius is on a quest to earn his knighthood! With only a circular medallion, a mysterious poem, and his own wits to guide him, he must find and rescue a missing king.

Includes slim plastic protractor attached to the inside back cover.

Math skill: measuring angles.

Paper, 32 pages. Ages 8-11.

#1699 $7.95

Sir Cumference and the Sword in the Cone
by Cindy Neuschwander - King Arthur has issued a challenge. The first knight to find the sword Edgecalibur will be the next king. Join Sir Cumference, Lady Di of Ameter, and their son, Radius, as they race to help their friend, Vertex, find the sword and discover the secrets of cubes, pyramids, cylinders, and cones.

Math skill: three-dimensional measurement.

Lots of colorful illustrations. Ages 8-11. Paper, 32 pages.

#6014 $7.95

Sir Cumference and the Isle of Immeter
by Cindy Neuschwander. This is the newest Sir Cumference math adventure!Young Per loves to play games. When she visits her uncle Sir Cumference and her aunt Lady Di of Ameter, they teach her a new game. But the game has a hidden message that points to a mysterious island.

Per and her cousin, Radius, set sail for the Isle of Immeter. Can the cousins unlock the secret of Immeter before the fearsome sea serpent finds them?

Math skills include finding the area and perimeter of a rectangle and a circle. Introduces an underlying concept of calculus -- using straight lines to measure curves.

Paper, 32 pages. Ages 8-11.

#6816 $7.95

Sir Cumference FUNPak (six-book set). Includes all six books in the series: Sir Cumference and All the King's Tens, Sir Cumference and the First Round Table, Sir Cumference and the Dragon of Pi, Sir Cumference and the Great Knight of Angleland, Sir Cumference and the Sword in the Cone, and Sir Cumference and the Isle of Immeter.

#FUN55R $47.70 $42.99

Calculus I Super Review
(REA)  includes a review of functions, limits, basic derivatives, the definite integral, combinations, and permutations. Take the Super Review quizzes to see how much you've learned - and where you need more study. It is a self-study study aid and textbook companion.

Features: student-friendly language to make learning easier, concise yet comprehensive coverage of the topic, simply presented and organized topic reviews.

Paper, 472 pages.

#1820 $9.95 $4.99

Taking the Numb Out of Numbers: Creative Ideas for Parents and Teachers to Help Children Understand and Enjoy Math by Don Fraser - Who should read this book? Those who like math and those who wish they did; those who are interested in numeracy, literacy and thinking; parents of students in grades 5 through 9.

The book includes lots of graphics, photos, comic strips, excerpts from magazine articles, and other interesting examples of math.

Paper, 192 pages. 8.75"x6"x.5". 1998 edition.

#7088 $16.95 $9.99 One copy available.

Thought Provokers by Doug Rohrer - provides 47 warm-up activities for the secondary classroom. Well-paced hints intrigue students while they develop their problem-solving and critical-thinking skills. Presented as one humorously illustrated problem per page, these blackline masters can be used to make individual student problem sheets or to assign to cooperative-learning groups. Problems can also make attractive wall decorations.

Paper, 64 pages. 10.7"x8.2"x.5".

#377X $29.95 $23.99 One copy available. Book has a corner crease and the cover is scuffed.


Math Texts by Harold Jacobs

We are not big fans of most textbooks, but we make an exception for Harold Jacobs. These are not books written by committee and designed to fit the purchasing requirements of some school system. Jacobs is a mathematician who so clearly loves mathematics, that he can't help but communicate that love to readers. He likes to use real-world examples and problems that help show the true value and relevance of math. He presents the complexities of math in a way that makes his books engaging and enjoyable to read. Don't get me wrong, these are still serious textbooks and not necessarily for someone with little interest in math. But if you have an interest in science, engineering, or mathematics and want to advance beyond the principles of basic arithmetic, then these are the books for you.

The instructor's manuals are not required, but they offer answers to all the problems in the textbooks plus lesson plans and suggestions for supplemental activities.


Mathematics, A Human Endeavor 3rd edition - This book was highly recommended to us by an experienced homeschooling dad. His oldest, who has since gone on to college, enjoyed using this text as a teenager. Our son used this book after using the Key to series.

Written at a high school/college level (general math or pre-algebra), it covers topics such as large numbers & logarithms, mathematical curves, an introduction to statistics, functions & their graphs, topology and more. The author chooses interesting topics to illustrate math concepts in a fun and interesting way. There are plenty of illustrations, including comic strips, in this useful book.

Hardcover, 678 pages Table of Contents.

#426X $115.99 $89.99

Instructor's Manual:
#4227 $64.95 $59.99

Student Workbook
by Susan Knueven Wong provides spaces for answers to the problem sets in the above text as well as additional exercises inspired by the text. Paper, 295 pages.
#5398 $62.99 $58.99

Test Bank
by Harold Jacobs provides 855 questions designed to parallel the exercises in the text book. Yes, all of the answers are provided in the back of the book! Paper, 108 pages
#569X $37.95 out of stock

Mathematics, A Human Endeavor: Text and Instructor's Manual FUNPak - Includes the text and the instructor's manual.
#FUN51 $180.94 $145.99

Elementary Algebra - Also a high-school/college level text that covers functions & graphs, integers, rational numbers, equations with one and two variables, simultaneous equations, exponents, polynomials, factoring, fractions, square roots, quadratic equations, fractional equations, inequalities and arithmetic/ geometric number sequences. Answers to one set of the exercises are included at the end of the book. Hardcover, 876 pages Table of Contents
#0471 $95.95 $69.99

Teacher's Guide - Contains the rest of the exercise answers not included in the above text (sets 1,3, and 4), as well as: lesson ideas, motivational materials, interesting bibliographical material, common student misconceptions and effective techniques for dealing with them, and additional activities.
#0757 $30.95

Test Masters contains test for each of the 17 chapters along with midyear and final tests. Answers are included along with drill exercises and word problems. Paper, 154 pages.
#0773 $30.95

Transparency Masters - this bound book shows students how the principles in Elementary Algebra work. The transparencies include puzzles, graphs, examples, quizzes, answers to exercises, number tricks, cartoons and more - to reinforce the material in the text. The pages of this book are perforated so that they can be easily removed and used to make projection transparencies with a thermographic reproduction machine. Suggestions for using the transparencies are in the Instructor's Manual.
#0765 $66.95 $63.99

Geometry: Seeing, Doing, Understanding, 3rd edition
- We really liked the second edition, and the third edition is even better! There is more focus on informal and paragraph proofs, over 30% more exercises, and almost all of the exercises are new or revised. Problems from the SAT are included as well as examples from around the world and ancient and modern times that help show the real life applications and universal nature of geometry.

The artwork is now in full color and there are over 2,200 new photographs, drawings and cartoons to illustrate the examples and exercises. It is a high school/college level text that covers points, lines and planes; rays and angles; congruent triangles; inequalities; parallel lines; quadrilaterals; area; similarity; circles; the right triangle; the concurrence theorems; regular polygons; geometric solids; non-Euclidean geometry; and coordinate geometry.
A couple of math-professor friends have told us they really like the proofs in this text.

Our son worked independently using this book and met once a week with a friend and a tutor to go over the work. Both boys really enjoyed the text and our son would frequently share bits from the books that he found interesting. It's such a joy to have your child share their enthusiasm for learning new information and to learn something new yourself.

Hardcover, 780 pages Table of Contents.

#3612 $115.95 $89.99 Out of Stock.

Enhanced Teacher's Guide - much more than just an answer book, there are 603 pages of lesson plans, additional background information on many exercises and, of course, solutions to all exercises in the text book.
#6072 $62.95

Improved Geometry 3rd edition Test Bank
- Prepared by Harold Jacobs and long-time Geometry user, Donald M Luepke, this new Test Bank offers 400 new exam questions (1 new test for every chapter, plus new mid-term and final exams). Includes solutions in the back of the book. Paper, 80 pages.
#5942 $37.95 Out of Stock.


Whatever Happened to Penny Candy? (Book 2, Uncle Eric series) by Richard Maybury.  I cracked open this book with a bit of trepidation. Throughout my 16 years of schooling, I got excellent grades, except in my college economics class. I had a wonderful teacher, but the subject matter did not hold my interest.

Not only is the Penny Candy book easy to understand, I actually enjoyed it! It explains our economic model, which is based on free-market Austrian economics, and has lots of interesting facts about money. Learn why certain coins have ridges, the origin of the word "dollar," as well as what causes inflation. The book is written as a series of letters from "Uncle Eric" to his 9th grade nephew.

“Maybury challenges the reader to explore the inextricable connections between law and economics, and between economic and political liberty. I can think of no more important subject, and I highly recommend this lucid and thoughtful volume.” —William E. Simon, former U.S. Treasury Secretary

This is the new, 6th edition. Paper, 192 pages. Ages 10-adult. See Economics: A Free Market Reader for further related reading.

#7627 $14.95 $13.99

You can also purchase the student study guide for Whatever Happened to Penny Candy titled, A Bluestocking Guide: Economics.

Bluestocking Guide: Economics, 2nd edition
by Jane Williams. (Uncle Eric series). Study guide for Whatever Happened to Penny Candy. Includes chapter-by-chapter comprehensive questions/answers for Penny Candy, suggested activities, articles that expand on concepts presented in Penny Candy, resources, a final exam, and an economic timetable. 

This study guide is designed for multi-age level use for ages 10 through 18.

Paper, 127 pages. 8-1/2" x 11".

#7634 $16.95

We carry all the books in the Uncle Eric series.

Economics: A Free Market Reader
contains a collection of thirteen articles by noted economists selected to enhance students' understanding and appreciation of the subject of free market economics. Thought and comprehension questions/answers (original to the book) are also provided for each article. The articles were selected to accompany Richard J. Maybury's book, Whatever Happened to Penny Candy? and its corresponding Bluestocking Guide: Economics, but the book can stand on its own.

(Note: These selected articles originally appeared in The Foundation for Economic Education’s monthly study journal, The Freeman, and were subsequently reprinted in Free Market Economics: A Reader.)

I enjoyed this book very much and highly recommend it.

Ages 12+ Excellent for economics courses.

Paper, 128 pages, 5-1/2” x 8-1/2”.

#7443 $12.95


Key to...series

Published by the Miquon Math folks (Key Curriculum Press), this is a very inexpensive series of workbooks that could be used independently, after completing the Miquon series or as a supplement to another program.

Studies have shown that countries that do well in math use texts that focus narrowly and in depth. Most schools in the U.S. try to cover too many topics, using huge textbooks, and have to cram the information into students in order to complete all the topics in the time allotted. The result? A very shallow understanding of many topics.

The Key to...workbooks use a step-by-step approach, with clear and direct instruction. The books have large type, lots of white space, and present only one concept per page or two. There are three to 10 workbooks in each series, and each fairly short in length.

We've listed the books according to their recommended grade level, but you need to determine what will work best for your child. You may have a younger child who is ready for more complex mathematical concepts or an older child who needs more practice or review.

We've included all workbooks and answers/notes in each kit. Reproducible tests are sold separately, where available.

wpe14.jpg (1956 bytes) Key to Fractions Kit Covers basic concepts to mixed numbers. Grades 4-12. 4 workbooks, 1 answer/notes book.
#KC01 $21.75 $18.99

Key to Fractions Reproducible Tests Grades 4-12.
#4961 $11.95 $10.75

Key to Decimals Kit Begins with basics concepts and operations on decimals. Then it covers real-world uses of decimals in pricing, sports, metrics, calculators and science. Grades 4-12. 4 workbooks, 1 answer/notes book.
#KC03 $21.75 $18.99

Key to Decimals Reproducible Tests Grades 4-12.
#4260 $11.95 $10.75

Key to Percents Kit Emphasizes mental computation and estimation skills first and then solving percent problems using fractions and decimal multiplication. Finally, percents are used to solve word problems in a variety of applications. Grades 4-12. 3 workbooks, 1 answer/notes book.
#KC05 $17.80 $15.99

Key to Percents Reproducible Tests Grades 4-12.
#4953 $11.95 $10.75

Key to Algebra Kit New concepts are presented in simple language. Word problems relate algebra to familiar situations, helping students understand abstract concepts. Books 1-4 study integers, Books 5-7 introduce rational numbers and expressions, and Books 8-10 extend coverage to the real number system. Grades 5-12. 10 workbooks, 3 answer/notes books.
#KC07 $57.35 $49.99

Key to Algebra Reproducible Tests Grades 5-12.
#012X $15.95 $14.00

Key to Geometry Kit Learners prepare for formal geometry as they do step-by-step constructions. Using only a pencil, straightedge, and compass, they begin by drawing lines, bisecting angles and reproducing segments. Later they do sophisticated constructions involving over a dozen steps and are prompted to form their own generalizations. When they finish, they've been introduced to 134 geometric terms and are ready to tackle formal proofs. Grades 4-12. 8 workbooks, 4 answer/notes books.
#KC09 $67.40 $59.99

Key to Measurement Kit Covers English units of length; measuring length & perimeter using English units; finding area and volume, using English units; and English units for weight, capacity, temperature and time. A variety of hands-on experiences are used to related to the English system of measurement. Grades 4-12. 4 workbooks, 1 answer/notes book.
#KC10 $21.75 $18.99

Key to Metric Measurement Kit In this newest series of the Key to . . . workbooks, users learn how to measure in metric units – the only system used in international commerce and communication, and one becoming more and more prevalent in the U.S. Covers: metric units of length; measuring length and perimeter using metric units; finding area and volume using metric units; and metric units for mass, capacity, temperature, and time. Grades 4-12, 4 workbooks, 1 answers/notes book.
#KC11 $21.75 $18.99

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