This lesson was used before the Illustrative Math lesson, 3.MD Finding the Area of Polygons, https://www.illustrativemathematics.org/content-standards/tasks/1515. This lesson was used with a 4th grade tier 2 math intervention group to demonstrate that different shapes can have the same area.
Task: Fold and cut six notecards along one of their diagonals. Arrange the triangles into six different shapes. Each shape must be composed of two parts. Only sides of same lengths can be matched up and must be matched exactly. Decide which shape has the greatest area and which shape has the least area. Students will build an understanding of conservation of area and partitioning shapes with equal areas. After the students were secure in their understanding we completed the lesson from Illustrative Mathematics.
- Subject:
- Mathematics
- Material Type:
- Learning Task
- Date Added:
- 04/29/2018