One of my favorite memories of grade school was a music class in sixth grade. Sister Marie Raymond, who was not my favorite teacher, helped us write lyrics to a song. I don't remember even what the song was about. She wrote the lyrics on the chalk board and then told us to begin to sing!
We were so surprised because there were no notes, how could we sing the song? After many students spoke up and asked how we were supposed to do that she told us we would all naturally sing together eventually and she would write the notes above the words.
I was amazed because it actually worked. Even though I do not remember anything about that song it taught me about working as a team. It was fun and unexpected and made a lasting impression on me.