The Dimensions Math 3B Textbook corresponds to the 3B 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 3B cover multiplying and dividing with 6, 7, 8, and 9, fractions, measurement, geometry, area and perimeter, time, and money.