Welcome to The Abacus, a site dedicated to the Art of Counting with Beads. This site is full of information that I didn't know-for instance, there is a specific way to use the abacus and only certain fingers should be used to count.
In the Introduction, which I found to be worth the read, you learn about the Basics of using an Abacus and how they are constructed. There is a java applet where you can see how an Abacus works, and you can learn how the Abacus is still used today. Note that screen reader users will have a hard time with this section.
The History section is exactly what it says-it's the history of the Abacus from it's earliest recorded origins to present day. There is a great timeline too!
The Interactive Abacus Tour requires you to have Java, and teaches you how to add and subtract on and Abacus. I thought this was really neat for people who use screen magnification programs, but is unfortunate that screen readers will have some difficulty. It comes with a built in tutor, and you can chose the style of Abacus you want to learn on.
The Calculations Section gives you the option of Addition, Subtraction, Multiplication/Division, Square Roots, and Cube Roots.
The Lee Abacus section lets you browse the manual for the Abacus in two ways. Check it out.
The Abacus as Art - this section is dedicated to the art of Michael Mode who builds exotic abaci (abacus plural) some of these are really cool. My wife's favorite is the Abracadabracus model.
Now that's just enough to get you started with this site, there is a lot more for you to discover like the "Abacus: the Mystery of the Bead", and all the interesting articles on the Abacus. Count on having a good time.
Click this link to visit The Abacus home page: http://www.ee.ryerson.ca:8080/~elf/abacus/.
The Abacus for the Blind
The abacus packet provides extensive links to resources on the abacus and can be accessed through the Web Link below.
13-rod abacus. Frame measures 6 1/8 x 3 1/4 inches. White beads have a diameter of 3/8 inch. Dark felt backing prevents beads from slipping. An optional metal coupler is available for linking two abacuses together. Recommended ages: 5 years and older.
Catalog Number: 1-03150-00
Click this link to purchase a Cranmer Abacus. Coupler for Cranmer Abacus:
Catalog Number: 1-03160-00
Click this link to connect two together with the Cranmer Abacus Coupler.
A counting frame for reinforcing beginning mathematical concepts such as one-to-one correspondence, counting, place value, addition and subtraction. Introduces basic abacus terms such as "set" and "clear." Consists of a black rectangular frame with 2 rods. Rods have 9 large white beads that slide against a dark felt backing. Frame measures 2 1/2 x 5 1/2 x 1. Print guidebook included. Braille guidebook available separately. Recommended ages: 5 to 7 years.
Beginner's Abacus (includes print guidebook):
Catalog Number: 1-03180-00
Print Edition Guidebook Only (included with abacus):
Catalog Number: 7-03180-00
Braille Edition(must be purchased separately):
Catalog Number: 5-03180-00
Click this link to purchase the Beginner's Abacus.
Young students and those without fine motor skills can benefit from this large 13-rod abacus. Frame measures 8 1/4 x 4 1/2 inches and the bead diameter is 1/2 inch. White beads slide against a dark felt backing. Recommended ages: 5 years and older.
Catalog Number: 1-03170-00
Click this link to purchase a Large Abacus.
Abacus Basic Competency: A Counting Method
An instruction manual to teach children and adults abacus skills in the four basic math operations through instruction and exercises. This abacus instructional system uses the Counting Method instead of the traditional indirect method. Advantages include:
- Simple method comparable to the way young sighted children count and add by counting things one at a time, as in counting on fingers or time lines.
- Minimum number of rules must be learned in order to arrive at an answer to a mathematical problem.
- Speed in using the abacus is not lessened with this method. Accuracy is increased, frustration is eliminated.
Catalog Number: 7-00219-00
Catalog Number: 5-00219-00
Click this link to purchase Abacus Basic Competency: A Counting Method.
Other Abacus Books
The Abacus Made Easy
A simplified manual for teaching the Cranmer Abacus by Mae E. Davidow.
Catalog Number: 5-00220-00
Large Type Edition:
Catalog Number: 4-00100-00
Click this link to purchase Abacus Made Easy.
Abacus Made Easy, Braille Ed., Now Available as Free Download
The Abacus Made Easy in braille (catalog number 5-00220-00)is an addition to our growing list of free-of-charge downloadable manuals. You may print or emboss these manuals as needed. We will continue to package hard copies of these manuals with their products and sell hard copy replacements. We do not keep these manuals in stock, but make them on demand as orders are placed for them; therefore, please allow several weeks for delivery.
Using the Cranmer Abacus for the Blind
Manual for instructing users who are blind or visually impaired in the use of the Cranmer Abacus. Gives instructions on how to add, subtract, multiply, divide, extract roots, compute decimals and fractions, and use abacus as a calendar. Practice exercises are included, written by Fred L. Gissoni.
Catalog Number: 6-50100-00
Large Type Edition:
Catalog Number: 4-27110-00
Click this link to purchase Using the Cranmer Abacus for the Blind.
Hands-On Experience with the Cranmer Abacus
This DVD and an accompanying booklet are designed to familiarize you with the basic uses of the Cranmer Abacus. The concepts and skills covered include how numbers are represented and how to perform the four basic math functions on the abacus.
Click this link to purchase Hands-On Experience with the Cranmer Abacus.
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