In the third form, pupils continue developing their science skills and understanding, building on the work covered in the first and second years. Emphasis is placed on observing and explaining a variety of physical phenomena and encouraging scientific enquiry. Homeworks are generally set from a questions booklet.

Topics covered in the third form include the core topics:-

1. Waves and light
2. Forces
3. Energy transfer due to heating
4. Electricity and magnetism
5. Space

All classes cover the core topics before the end of year exams. Towards the end of the year, the KS4 course is started together with investigation work.