I've got a day's regular supply and usually have chance to plan in advance. However, I find that when things are cancelled/ different in school, I can be asked to just take a class for a lesson with no planning. How do I build up a bank of good activities to cover these situations? Short - longer activities required. I'm just a bit lacking in imagination at the moment! Maybe a few games, individual and group activities. Y1 - Y6. Thanks.