Research the National Curriculum for Primary and Secondary levels to find out more about what you would teach.
Get some experience with different age groups if you are not sure about which would suit you best.
Not sure about teaching?
Whilst you are studying for your degree you have the perfect opportunity to gain work experience to help you decide whether teaching is the right career choice. It also prepares you to move on into professional teacher training after your degree, although some graduates do go on to work in schools in teaching assistant and other support roles following graduation. There is now also a paid Try Teaching scheme for graduates which could help you decide if teaching is for you.