This set of three Grade 1 Kumon workbooks includes the following complete workbooks:Addition covering the following topics:-Counting, reading, writing, and ordering numbers to 120. -Understanding the whole number system-Addition sums beyond 30-Patterns & sequencingWord Problems covering the following topics:-Word Problems using Addition-Word Problems using Subtraction-Word Problems using Ordinal NumbersSubtraction covering the following topics:-Counting, reading & writing numbers to 100-Addition review-Two-digit minus two-digit subtraction-Addition & subtraction with three numbers-Patterns & sequencingOur Calculation Workbooks follow the Kumon Method, a proven learning system that helps children succeed and excel in math. Kumon Workbooks gradually introduce new topics in a logical progression and always include plenty of practice. As a result, children master one skill at a time and move forward without anxiety or frustration.