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Illustrative Mathematics
Illustrative Mathematics: 4.nbt What's My Number?
The purpose of this task is for students to reason about base-ten numbers on the number line in a way that will require them to use what they know about place value. Students first represent addition and subtraction on the number line in...
Other
Center for Game Science: Refraction
Use your knowledge of fractions, to save animals who have gotten stuck in space. Game practices the following concepts: equal partitioning, addition, multiplication, mixed numbers, improper fractions, and common denominators. Teacher can...