AoPS 8-Book Set : Art of Problem Solving Beast Academy 2A and 2B and 2C and 2D Guide and Practice 8-Book Set : Beast Academy 2A covers the following topics: Place Value : Digits, ones, tens, hundreds, breaking and regrouping, adding and subtracting 1, 10, or 100. Comparing : The number line, distance, consecutive numbers, using , ordering numbers. Addition : Sums, place value strategies, counting up, adding and taking away, doubles, making 10's and 100's, friendly sums. Beast Academy 2B covers the following topics: Subtraction : Place value strategies, using addition, finding a difference, counting up, subtracting then adding, subtracting all at once, and subtracting in parts. Expressions : Evaluating expressions, using parentheses, working with symbols, simplifying, and solving equations. Problem Solving : Guessing and checking, working backwards, drawing a picture, finding useful information. Beast Academy 2C covers the following topics: Measurement: The measurement chapter only includes measuring length, and includes using a ruler, estimation, customary and metric units, conversions, mixed measures, and adding and subtracting. Strategies: Rearranging addition and subtraction, canceling, almost canceling, subtracting everything at once, using parentheses, and skip-counting. Beast Academy 2D covers the following topics: Big Numbers: Thousands, millions and larger place values. Reading, writing, adding, subtracting, comparing, and estimating with big numbers. Algorithms: Stacking addition with regrouping, adding more than two numbers at a time, stacking subtraction with breaking, and solving cryptarithms. Horrible Ray endorses the Art of Problem Solving Beast Academy 2A and 2B and 2C and 2D Guide and Practice 8-Book Set for 2nd Grade and up. Horrible Ray, Horrible Books, Horrible University., ISBN13: 9781934124376 ISBN10: 1934124370 Material Type: paperback