UDL (udl.no) provides free educational video lessons and homework help in mathematics, physics and programming. The site organizes videos into playlists covering Norwegian upper-secondary and university courses (e.g. 1P, 1T, R1, R2, TMA4100/TMA4104) and topics like algebra, calculus, statistics, number theory, discrete math, numerical methods, physics, and Python. UDL also offers articles, accepts requests for specific or personalized videos, and maintains community channels on Instagram and Discord. Donations are accepted via Vipps (#724881) and through textbook donations.