What is CK-12 Foundation?
CK-12 is an interactive and intelligent learning platform that's free for everyone.
Used by more than 200 million students and teachers worldwide, CK-12 empowers learners with high-quality content and cutting-edge technology.
FlexBooks® 2.0 technology enables students to learn in their own way - whether by reading, watching videos, exploring interactive simulations, or answering personalized practice questions with immediate feedback for both correct and incorrect answers.
Flexi the AI-powered tutor makes learning engaging and answers students’ science questions with interactive examples to help them understand the underlying concepts (coming soon for math). Flexi provides students with timely reminders of upcoming assignments, topics they may have forgotten or missed, their next topic to learn, and any unfinished work - helping them stay on track. Flexi helps students self-reflect to answer questions like: "How am I doing?", "How can I improve?", "What am I missing?"
Flexi empowers educators as well, providing every teacher with a digital assistant that uncovers student learning gaps and misconceptions, and offers personalized insights on where to intervene effectively. Flexi updates the grade book in your LMS as students turn in their work so that you can focus on teaching, and even helps assign auto-graded assignments to classes in Google Classroom, Schoology, and Canvas
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Educational Impact
As long as you have a phone or laptop that can access the internet, you can use CK-12!
Class roster can be uploaded, but individual users only need basic information. It takes about one minute.
Our platform is designed to be simple and intuitive - you can use it without any training. However, to help you get the most out of CK-12, we also host live webinars, provide on-demand webinars, and run a free certification program.
Anyone can create the account.
CK-12 Foundation Pricing
Free Version
CK-12 has no subscription, no advertising and no licensing to schools or users. Everything on CK-12 is 100% free – forever. Get in touch if you wish to make a donation.

CK-12 Foundation Reviews
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