A balance scale holding 5 pounds on the left and 3 and 2 pound weights on the right showing 3+2=5.

"A pile of wood 1 ft. long, 4 ft. wide, and 4 ft. high, or 1/8 of a cord, is called a cord foot. Find…

This fraction chart can be used for students to find A, B, and C in percentage. It can also be used…

A pie graph of "Proportion of World's Supply of Cotton contributed by each country" labeled with country…

Three students work from using dots as counters in columns (left) to writing the symbolic number (right).