Dimensions Math 4B Textbook

The Dimensions Math 4B Textbook guides fourth-grade students through the second semester using Singapore Math's mastery-based methodology. Each lesson follows a four-part structure: Think sections encourage students to explore problems using multiple approaches before formal instruction, Learn segments present solutions with clear definitions, Do activities provide guided practice, and Exercise components connect to workbook reinforcement. This 248-page, full-color textbook includes chapter openers that build curiosity while reviewing prerequisite skills, along with periodic practice sessions and cumulative reviews for ongoing skill consolidation.

Chapters 10-17 cover Measurement, Area and Perimeter, Decimals, Addition and Subtraction of Decimals, Multiplication and Division of Decimals, Angles, Lines and Shapes, and Properties of Cuboids. The curriculum develops concepts through increasing levels of abstraction, emphasizing thorough exploration before advancing. Word problems feature prominently throughout, requiring students to apply mathematical reasoning in varied contexts.

The Dimensions Math program divides the school year into two semesters—"A" books cover the first half, while "B" books complete the year. All three components (Textbook, Workbook, and either Home Instructor's Guide or Teacher's Guide) work together as the complete instructional system.