The Dimensions Math KA Textbook corresponds to the KA workbook (required and sold-separately). This textbook also features hands-on workpage elements alongside very simple and direct lessons. Concepts are taught through immersive, visual 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 K-A cover matching, sorting, classifying, comparing objects, patterns, and numbers to 10.