Khan Academy

Khan Academy remains the gold standard for free K-12 education, now enhanced with AI-powered Khanmigo, which guides independent learning rather than providing direct answers. In the 2024–25 academic year, Khanmigo usage surged from 40,000 to 700,000 K-12 students, projected to exceed one million in 2025–26, far outpacing adoption rates of newer educational technologies.