A piece on the side
A: I agree that application forms assume teachers have had a particular career history. This can be frustrating, particularly for those with a different set of experiences. If you have worked for particular agencies, include them as the employer and then list the schools with the number of days in each. If there are too many schools, categorise them in some way, by level or local authority. The main place to make the most of your experiences is in the letter of application. Here you can make an asset out of the large number of different schools. Cite examples of good practice you have observed and made use of later. Also, if some schools have asked for you on supply, include them, and consider using the head of one of them as a referee. Make it clear that you have worked throughout the year so are familiar with issues such as assessment points and the different tasks that arise during the year. As with all these types of problems, it is best to make a virtue out of necessity.