In my technical drawing class for some reason the teacher was such a softie.. that we basically learned nothing. The class had two sections, there was the front part of the classroom with drafting desks and the chalkboard etc, but there was an enclosed space at the back where there was a small computer lab. At some point during the year we all just would go back there and play computer games for the majority of the period. The computers all had games installed, Quake, SNES emulator etc. And we all ended up with As and learned nothing. This was my regrettable curriculum.