As we continued work on Geometric Measure & Dimension Performance Assessment Tasks, I tried to give students some choice.

Everyone started with Some Really Obscure Geometry Problem.

Guesses for region A were 32-50, with the median at 40%.

Guesses for region B were 5-18, with the median at 10%.

Guesses for region C were 12-23, with the median at 20%.

Guesses for region D were 25-38, with the median at 30%.

Students then chose whether to try the square task or a Triangles task that used to be on the Mathematics Assessment Project site but doesn’t seem to be anymore.

Students specifically practiced **look for and make use of structure**.

And **show your work**.

We don’t always “finish” tasks like these. I wonder how much that matters.

Is it enough to begin to make your thinking visible to the readers of your work?

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howardat58

September 21, 2015 at 12:22 pm

I like the obscure geometry problem.

The coordinates attempt could be more convincing if they had taken a 9 by 9 or a 3 by 3 square!

Sometimes you have to get onto the diagram, held vertically, and see what it does to you.