Last year, I made some big changes to my scope and sequence. (You can read about them here.) The most controversial change I made was moving 3D Measurement to the first unit. This year I plan to move the 3D Measurement back to where it belongs according to the EngageNY modules. Another decision I made was to move Coordinate Geometry back, also according to the EngageNY modules. This is a tough one for me, because I love teaching Coordinate Geometry early in the course when students still remember how to graph. We refer back to the unit often throughout the course, but I then must redistribute some of the topics to other units. (This includes coordinate proof and partitioning a line segment.) I am, however, looking forward to teaching an easier unit toward the end of the course. It falls at right around that time when spring break is getting close but is still too far away, and student interest is waning.
This is my proposed sequence of units:
1. Essentials of Geometry
3. Congruent Triangles
4. Properties of Triangles
7. Right Triangle Trigonometry
8. 3D Measurement
9. Coordinate Geometry
The thing that I am considering now is this: What if I save proofs for the very end? I often find that I teach it in about November, have to nearly re-teach it for Polygons in January, have to spend time again in February during Similarity, and then have to re-re-teach it during review. (I usually wait until review before going over circle proofs.) I've heard of other teachers saving proofs for last. Geometry teachers, I need your help! What are your thoughts or experiences with teaching proofs at the end?
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