Illustrative Mathematics
Illustrative Mathematics: Counting Dots in Arrays
This task aims to show learners that there is often more than one way to represent a quantity. This lesson also lays a foundation for students to understand the commutative property of multiplication.
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Better Lesson: Filling in the Middle
Students use both area and perimeter to work with geometric shapes.
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Better Lesson: 3 Digit Perimeters
Second graders work with 3-digit numbers as they solidify their understanding of the difference between perimeter and area.
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Better Lesson: Doubles and Halves Are Patterns Too
Can you double an odd number? Can you cut it in half? Patterns in doubles and halves help to answer these questions.