The Dimensions Math 2A Textbook corresponds to the 2A workbook (required and sold-separately). This textbook also features hands-on workpage elements alongside very simple and direct lessons. Concepts are taught through visual, immersive, and interactive scenarios created with five characters: Emma, Alex, Sofia, Dio, and Mei. Logically sequenced lessons provide a strong foundation for increasingly complicated math concepts. Chapters in 2A cover numbers to 1,000, addition and subtraction, length, weight, multiplication and division of 2, 5, and 10 .