CK-12 Foundation ★ 0Sign in to vote

CK-12 Foundation is a nonprofit organization that provides free digital educational materials and tools for students, teachers, and families. Its resources include FlexBook textbooks, interactive lessons, videos, practice activities, and classroom features that educators can use to adapt learning to student needs. CK-12 materials span school subjects and can integrate with learning-management and classroom systems. Content and features vary by subject and grade, so educators should review the specific resource for alignment, licensing, accessibility, and classroom use.