If you live further away, why not consider getting a bus to school? This will be better for the environment, as well as reducing the congestion around school. It will also give you a bit of exercise, walking to and from the bus stops.
There are 3 routes which drop you near school; the number 5, the number 1 and the number 1A. To plan your route, just use the link below. The full timetables (pdfs) and more information about the routes (web link) are also available below. The pdfs of the full timetable are also available from the school office.