Workbook Features: - Ages 9-12, Grades 4-6- 352 pages, 8 1/2 inches x 10 1/2 inches - Covers patterns, intervals, addition/subtraction, multiplication/division, and more- Features puzzles and problem-solving activities- Answer key includedFocused Practice: Singapore Math Challenge Workbook for fourth, fifth, and sixth graders helps students ages 9-12 strengthen their math skills through progressive lessons, interactive problem-solving exercises, engaging puzzles, and assessments. Meets Singapore Textbook Standards: This workbook can supplement classroom or homeschool math lessons or be used for added practice. Students learn how to identify patterns, work backwards, and tricks for adding/subtracting and multiplying/dividing. How It Works: Clear instructions begin each section with lessons that include step-by-step examples and practice pages, with problem-solving activities and puzzles to test students' math skills and ensure they're ready to move on to the next concept. Working Together: Parents love using the workbook for added practice from home, and teachers love to incorporate it into hands-on math lessons. Track student progress with the answer key in the back of the workbook. Why Singapore Math: Singapore's math curriculum has been recognized worldwide for helping students produce excellent mathematics skills. The series includes practice that provide students with a strong mathematical foundation for ongoing success.