It's not really a big deal IMO but ds1 (Y2) gets a little upset about the fact that all his classmates have reward charts for their stickers. He was absent when they were given and when he asked his teacher for one she said sorry, and I don't know what explanation she gave.
Anyway, I think she should have got enough for everyone but, for whatever reason, he doesn't have one so I bought one for him to take in and keep in his tray. Do you think teacher will mind?