As a supply teacher you always want to make a good impression at a new school. It’s important to make a good name for yourself in the area where you’re based as this will encourage schools to offer you more work. A bad reputation among teaching staff for things like poor time keeping could negatively affect your chance of getting work.
Try to arrive at school nice and early so you can get up to speed with school day routines. Teaching assistants are invaluable in keeping things running smoothly and helping you get to know the pupils. If you are working to planning provided by the regular class teacher, try to stick to it as it can be frustrating to have to re-work planning later to include what was missed. Make sure all work is marked properly and in line with the schools marking policy. Teachers don’t like to face criticism for improper marking during a book scrutiny when its not their marking! Finally, you should leave the classroom as tidy as you (hopefully) found it.