If you are looking to start the new academic year as a supply teacher then you may want to start looking now for place you may be able to work at. You can often register with the local district council to allow you to be offered jobs within that area or you could register with a teaching agency. A teaching agency is often more likely to be able to find you work quicker and if you are willing to travel you may find you have enough work on a monthly basis to earn what you need to.
Some schools will only use teaching agencies, and therefore you may miss out on wok if you are trying to go it alone.
When signing up with an agency you often also get extra perks. These may include access to online material that can be used in the classroom as work sheets, lesson planning ideas and display examples. Some agencies also have a place that you can communicate with other members who are registered with the agency to allow you to share ideas of lessons and discuss lessons that have worked or even that have not worked. This can also form a great support network for teachers.