Sometimes, teachers need some love too.
A box of chocolates with mini-cupcake bon bons surrounding it - simple and cute. I brought this one into my practicum school on Valentine's Day. Staff ooh-ed and aww-ed and coo-ed, and then ate. Boy did they eat.
First, the little mini-cupcake bon bons started to disappear. Those were my favourite part of the cake - I cut marshmallows in half, dipped them in chocolate, and decorated it accordingly. Before I knew it, the cake was cut and demolished. I don't think I even got a piece. Teachers can be ravenous.