Khan Academy: free education for school and adult learners

Khan Academy is a long‑established free learning platform offering video lessons, practice exercises and progress tracking across maths, science, computing, history and more — suitable for primary to secondary school students and adult learners. There is no charge to use the core content; parents and teachers can create free accounts to assign resources and monitor progress. UK residents can access the full library through the Khan Academy homepage and sign up free with an email address.