Reflection: Intervention and Extension The Many Faces of Surface Area - Section 3: Exploration


So many kids wanted to draw the 3D figure on the grid paper. At first I thought this might be a waste of time, but when I did take the time I realized it was a really valuable way to help remediate their definition of rectangular. Many of them were not entirely clear that opposite sides or edges of a rectangle are equal and parallel. It is worth the time spent on direct and peer instruction to intervene. Instruction for drawing on grid paper. I started with grid paper even though it is not as mathematically precise, because it is easier for students to work with. Then I taught them how to draw on isometric dot paper in a support lesson as these are more accurate representations.

It is my hope that with a few years of common core under their belt students will have these experiences at earlier grades and will not need so much intervention.

  Intervention and Extension: Drawing 3D figures
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The Many Faces of Surface Area

Unit 9: Exploring Surface Area
Lesson 5 of 6

Objective: SWBAT calculate the surface area of a rectangular prism from a drawing.

Big Idea: Students discover the relationship between the dimensions of each face of a prism and the dimensions of the prism.

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Math, surface area, Geometry, rectangular prism, open ended questions, multiple methods, Student Choice, multiple representations, Mathematical connections
  55 minutes
describing 3d prism
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