I shared some of this last year, on my Beginning Proofs INB Pages post, but this year I did things a little differently.
I used this flapbook for the angle pair theorems and postulates. This time, I had my students write out the theorems underneath the flaps and also write the shorthand they are allowed to use in proofs. I leave my honors students a little more open-ended so that they have to fill in important information themselves. I'm trying to help them learn how to be good notetakers. I can't just turn them lose though, because most of them are freshmen!
This year, I added this page with two practice proofs. It is now part of the exclusive content in my geometry foldable bundle. I think it helped my students understand the proofs a little but better and I'm SO GLAD I had my students do the proof of the theorem. I don't think I prove theorems enough in class and this was a good addition to the lesson.
I'm happy with the way this lesson has evolved over the years. I think the Congruent Complements/Supplements Theorem are hard for students, but proving the theorem did help. I think this is the best that I've taught it, and my students are comfortable with all of the theorems.
