Today, I had my first taste of proof and it was not pretty. I made a rookie mistake of not thinking through the whole lesson. If I did, I would have copied the material for them to paste in to their notebooks. Beyond that, I did not expect how difficult the concept of proof would be. As I go through the year of learning how to teach Geometry, I think this will be one of the many lessons I learn and I look forward to learning.
I am testing some materials from the Meaningful Math Curriculum for Geometry this year and this is the first lesson I found a way to fit into my unit plan. I was impressed by the questioning behind the axiom exercise and I look forward to using it some more in the upcoming days/weeks.