The job of a teaching assistant can vary depending on the school and the teacher you are working with. Each school, although having to adhere to strict guidelines, can still to an extent change some of the ways in which the school is run. If you have previously been a teaching assistant in a school and then move to another you may have to learn to work in a different way.
It is important early on to establish what your job role entails exactly so you do not overstep the mark with the teacher and also so you do not miss any important tasks that you should be doing.
You may be given task such as creating displays, organising worksheets, collecting and giving out books, hearing children read and possibly taking a small group of children to work with during lesson time. If there is a pupil who has learning difficulties then you may be responsible for working with them the majority of the time.
Some teaching assistants that have teaching experience may be asked to cover the class for a short period if the teacher is away on a course or off ill for example.