Musings about math education.
Andrew Busch
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Similarity

Floodlights
Big honking whiteboards are a must. Well, I like them at least. This was/is a MARS resource. 
floodlights_s1_initial_problem.pdf
File Size: 56 kb
File Type: pdf
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12-2_floodlights_slides.ppt
File Size: 3170 kb
File Type: ppt
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Changes for next year. Split both the handout and the slides so Task #2 and #3 are on separate pieces of paper and slides. Homework for each night is to revise solution methods.
Mini-Golf
We had some great discussions and solution methods about how to find where the point needs to hit the wall. I originally stole this from Fawn Nguyen.
12-4.2_miniature_golf_directions.pptx
File Size: 253 kb
File Type: pptx
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12-4.2_miniature_golf_border.docx
File Size: 20 kb
File Type: docx
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Circles and Triangles Task
This was originally a MARS resource. After using it a couple of times, I cut out a lot of the supports and just hand students this:  
12-6.1_circles_and_triangles_task.docx
File Size: 41 kb
File Type: docx
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Changes for next year:
I would split the above document into two separate documents. I use one task per day. Students finishing early started on the next task and I didn't want that. My reason for not wanting it--I want good classroom discussion and I want students to revise their solution processes. I would assign revising solution methods as homework. 

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