Khanacademy

Khan Academy provides free online educational resources across subjects including math, science, history, and test preparation. Their platform offers instructional videos, practice exercises, and personalized learning tools accessible to learners worldwide. The nonprofit organization serves students from early childhood through university level, as well as adult learners seeking to build skills or explore new topics. Content is designed for self-paced study, making it suitable for homeschooling families, travelers, and anyone learning independently.