In this lesson students will begin with flash cards on example "statements" and "reasons" in a two-column proof. Students will then answer two questions as a class using half-filled two-column proofs, using problems they have solved before. Then, students will solve two problems without anything filled in about complementary and supplementary angles. Contains a link to the flashcards for online students also. www.mattedition.com
See attached worksheet. I created videos for all of the odd questions. The assignment was assigned to students for homework. I recommend instructing them to do the even questions with the odd solutions as a guide.