Manipulatives

Cotter Abacus CVI

Cotter Abacus CVI is Made in the USA!* This 9-3/4" x 7-1/2" (24.75 cm x 19.25 cm) plastic abacus is

Mechanical Pencil

This mechanical pencil is great to use with the geometry tools for more accurate lines.   MAD

Cotter Abacus

Cotter Abacus is Made in the USA!* This 9-3/4" x 7-1/2" (24.75 cm x 19.25 cm) plastic abacus is grou

Cards for Math Games

The 6 special decks of cards needed to play the math card games. Basic Number Card deck Money Ca

Place Value Cards

These plastic place-value cards help the child understand the number system. To construct 9823, st

Dry erase pen

The Dry Erase Pen may be used with the drawing boards.   Colors & Styles may vary.  

Math Balance Pin & Counter Weight Set

Included in this set are replacement counter weights for the Math Balance. Also included is a replac

Math Balance Junior

This smaller version of our math balance demonstrates the equality of equations and other math conce

Math Balance

A balance that demonstrates the equality of equations and other math concepts. Set includes an 8" by

Abacus Tiles

Ten heavy paper tiles that are a representation of the Cotter Abacus to introduce and enforce t

Base-10 Picture Cards

Set of 90 drawings (1" square) of the base 10 blocks grouped in 5s. The child can perform arithmetic

Fraction Charts

A set of plastic charts (10" x 10") for teaching fractions. One chart is a full master and the secon