You may find most of your work will be covering Art. Good call to have plenty of pens pencils and enough paper for one secondary lesson (reload on the hoof as necessary) I carry 30 sheets lined and 30 sheets plain. As you are an experienced art teacher then look back and remember your own favourite lessons, Also at the end of the day you will have done Art from other cultures, Aboriginal Art always a favourite on art KS3 schemes of work for example. I personally do not have loads of stuff on rewards, if the school let me know what the reward system is, or sometimes I find out on the hoof and use it. Expectations I personally do not make things complicated with writing things up, however it is personal judgement and what works for you. However a very important issue for me is how I do my supply introduction to the class. This sets the tone, act like a supply teacher and you will be treated like one! Teaching Art, The crem de crem of practical teaching is organizing paints, and clear up procedures. Not trying to be patronizing but take even more care than you used to, and always start clearing up in good time. Teaching other subjects, I would try not to carry to much, but I would be prepared with some basic general worksheets, numeracy literacy. Art HOD's come in all sorts, some are control freaks and some are flaky, I prefer the flaky ones!