## Reflection: Checks for Understanding Making Sense of Surface Area (day 2 of 2) - Section 4: Presentations

While groups are presenting the teacher has an opportunity to really listen. Don't waste this time. While I was listening to the presentations in my classes I noticed that many students referred to the units in such a way that alerted me to a potential weak spot. Some of them were referring to counting the "cubes" on each side. A couple of them referred to the units as "cubed" and several did not include units at all. You may not want to interrupt the presentation for corrections like this, but it might be useful to interject between presentations or at the end of class. Addressing this can lead to an interesting conversation about the two dimensional measurement of a three dimensional figure which can reinforce the concept of surface area. This is one of the confusing parts about surface area and focusing on it can really help Clarify.

Checks for Understanding: Listening for teachable moments

# Making Sense of Surface Area (day 2 of 2)

Unit 9: Exploring Surface Area
Lesson 4 of 6

## Big Idea: Surface area is the sum of the areas of all the flat surfaces on a 3D object.

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Standards:
Subject(s):
Math, surface area, Geometry, collaborative groups, visual representation, group presentations
54 minutes

### Erica Burnison

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