INVESTIGATIONS IN NUMBER, DATA AND SPACE Investigations in Number, Data, and Space, 2nd Edition is a research-based, child-centered approach to teaching mathematics through engaging activities, discussions, and problem solving. Students are involved in meaningful mathematical problems, and teachers engage in ongoing learning about mathematics content and how children learn mathematics. INCLUDES: Student Handbook Student Activity BookCONDITION: No significant writing or highlighting on the pages. Shows minimal signs of usage.