We are starting the unit on triangle congruence proofs (SSS, SAS, HL, ASA, and AAS) and constructions soon. Last year I did all of the required constructions on the first day (I hate teaching constructions by the way, but it's a necessary evil with the Common Core), spent the second day on problems related to simply "recognizing" each case without writing a formal proof, and then 3 days of proofs. It was good, but not great. The other teachers do one of the cases each day (with only SSS and HL on the same day). They start with the construction and then proofs. I kind of like their set-up, but at the same time they only do one day with bringing all of the different theorems together since each day they are just focusing on one. I feel many kids struggle picking which to use, and this is why I introduce them all at once....but maybe it would be easier one day for each. What do you think, and how do you teach them? Introduce all at once, or spread them across different days?