Strengthen basic math skills with jokes, comics, and riddles using Rib-Ticklers: Math for grade 1. Even the most reluctant learners and students intimidated by numbers approach everything from addition and subtraction to measurement and geometry with great enthusiasm. This 80-page book includes 70 standards-based activities that are perfect for individual, homework, and center assignments. The book also includes an answer key and a skills matrix, supports NCTM standards, and aligns with state, national, and Canadian provincial standards.