Mathematics Tutor, Teaching all under age of 14

I have just completed my GCSE's and am predicted a grade 9 in it. I know my understanding and explanation of mathematics is of a high standard; and due to this I would like to help other younger students to understand their lessons in school, or help them catch up; or even get ahead of lessons if needed. I know how student's minds work as I have experienced it in school myself, and I have helped my classmates reach a higher level. I know what I am doing and can ensure understanding to the highest degree.