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Investigations in Number, Data, and Space, Grade 4: Student Activity Book Engineering Power Systems Obama features rare and previouslyInvestigations in Number, Data, and Space, 2e 2008 Investigations Grade 4 Investigations in Number, Data, and Space; 2nd Ed (2008) components for Grade 4. Provide students with a journal of their mathematical work with a consumable workbook. Includes activity sheets, math games, homework, and daily practice pages. Available as a single volume or by unit. Investigations in Number, Data, and Space, 2nd Edition is a research based, child centered