They would look at the puzzle and then try to find two angles that looked similar and then they would look up the name of the angle pair. The really nice thing about this activity was that the kids all referred back to their colored diagram the entire time. I loved that there were many different ways to justify a lot of the angles so most of the kids had different work showing me that they really thought about it them self. Once they got the hang of it though, they did really great. They then needed an extra copy to start over.
A lot of kids didn't really listen to directions and just filled in every angle with either 130 or 50 and said they were done.
I would also make plenty of extra copies. If I were to do this again, I would go through the first few steps with them more slowly. For the kids that I had, this was their first real introduction into proofs or having to really justify their work. I loved it because it was really challenging for them. After going through this, I had them do an activity I found on Dan's post here.
