Grades 1 & up. Convey a concrete understanding of equivalencies while supporting addition, subtraction, multiplication, and division of fractions, decimals, and percents. Teaches equivalencies using relationally sized cards that are color coded so equivalent values match with enough of each size to equal 1. Includes 253 cards with numerals on one side and number words on reverse, 2 double-sided title cards, plus activity guide. 27"H x 20"W.