Antonine Education: Excellent site for physics with A level and GCSE content.
TES Resources: Content for all subjects, age ranges and ability.
Teach it Science: KS3 and KS4 content for Science.
Save my Exams: Contains practice papers and mark schemes.
Fuse School: Quality youtube clips for maths and science
Grade Gorilla: Online graded Physics and Chemistry quizzes.
Seneca Learning: Online learning platform that covers all levels and subjects.
Education Using PowerPoint: PowerPoints for Science GCSE, IGCSE and A level.
Physics for You: Resources for GCSE physics.