Why do you want to teach. 600 words maximum. Your draft needs to be within plus or minus 10% of the 600 word limit for me to provide detailed feedback.
your interest in the subject or age group
the demands and rewards of teaching
Outline the personal qualities that would make you a good teacher
Explain how you could contribute to a school outside of the classroom
Describe any past experience working with children or young people, and what you learnt