when we were in grade school we only had 17 in our class. We each had to make our own valentine box so when we passed out valentine's you put them in the boxes as they sat on each student's desk. We always had a contest for the best Valentine box. It's a shame they dont' do that anymore. We loved doing it. I still have valentine's from my grade school days.
My mom collects old valentines. She has some that my dad received when he was in grade school in a one room school house in the 30's