Free online lessons and practice on Khan Academy

Khan Academy provides completely free, ad‑free lessons, practice exercises and resources in maths, science, computing and more for school‑age learners and adults; content includes videos, interactive practice and personalised learning dashboards. It is available to anyone worldwide at no cost — UK families and students can use it to supplement school learning or revise. Access requires creating a free account at the website, where you can track progress, use teacher tools or study independently across age ranges.