Khan Academy — free lessons and practice for school and adult learners

Khan Academy is a long‑standing non‑profit education platform offering free instructional videos, practice exercises and personalised learning dashboards across maths, science, computing and humanities. Content is free to all UK residents without sign‑up (signing up is optional to track progress) and covers school‑age curricula and adult learning topics; teachers and parents can also use resources for classroom support. Materials are accessible online and suitable for learners at different stages wanting free, self‑paced study.