The attached document contained very scaffolded notes for an introduction to CPCTC proofs. (The worksheet should be cut in half, paper saver handout)
Blanks are provided for filling in definitions and postulates.
The clouds are intended for students to choose whether they want to use SSS, SAS, AAS, or ASA.
Circles on the sides of proofs are intended for students to write either S, A, or S, so they can back the postulate up. The last line of course is intended for the CPCTC reason!
This lesson was taught to my lowest performing kids and they got it! The key is to emphasize that the letters in the circles much match the letters in the clouds which much match the pictures, and must only be used when you have made a congruency statement with the congruency symbol.