CK-12 Foundation

CK-12 Foundation provides free digital curriculum materials for homeschool students and parents nationwide. Families can use customizable FlexBooks, practice activities, videos, simulations, study guides, and interactive learning tools. Parents can create classes, assign lessons, modify materials, and monitor student progress. Available subjects include mathematics, science, English, social studies, biology, chemistry, and other academic areas. CK-12 also provides AI-supported tutoring and lesson-planning tools. The platform does not issue diplomas, transcripts, certificates, or accredited course credit.