Khan Academy: free lessons and practice for school-age learners

Khan Academy provides free, self‑paced lessons, practice exercises and instructional videos covering maths, science, computing and more, with resources mapped to many school curricula. It’s free for learners and parents in the UK—create a free account to track progress, set up student profiles and use teacher/parent tools. Access all materials and practice problems online or via the app without charge; no payment or subscription is required for core content.