I collected the Logic Proof projects the other day. Actually, I just called it a "homework" and assigned homework credit. They had class time to work on it, and they checked with me as to the correctness of their setup and proof before they committed to poster board. And even with that, some students made mistakes, or didn't check with me, so some aspects of the project/homework were not satisfied. I guess that's par for the course. Here are 5 that passed muster and were clever.
Did I tell you the wonders of hot glue. A teacher at my school swears by it, and puts up all her posters and such with hot glue. I guess as long as it's on painted cinder block walls it's okay .... I guess I'll find out in June (ahem).