Originally published in 1934 and reprinted in 2023. Each 500-page book includes two years of instruction. Book 1 covers addition, subtraction, multiplication, division, and introduces geometry, fractions, and measurement. Book 2 reviews basic operations and covers fractions, decimals, and basic operations with each; measurement; consumer and personal applications; percentage; and graphs. Book 3 covers banking interest, geometry, installment buying, stocks, bonds, investments, ratio and proportion, square roots, writing and solving equations.