Share your content with the CK-12 community

Share your secret sauce with other teachers!

Have you designed a great lesson plan for your class, developed an interesting worksheet or set of problems for your students, or created exciting labs and activities to supplement your science/math textbook? How would you like to share this creative product with your teaching community? We’d like to hear about it.
Just donate your favorite problem set, worksheet, lab, activity or lesson plan that covers any of the middle- or high-school science/math subjects and we will publish it on CK-12 under the CC-BY-NC-SA license. Attach your work to an email and include the abstract of your idea, the grade level for which it is intended and the course it is designed to cover. Send your work as a Word document to .
Thanks for your interest in CK-12 Foundation and for sharing your secret sauce with the teaching community at large!

Author Agreements and Terms of Use

You agree that you are donating your contributions to CK-12 and you will not receive monetary reimbursement. If the submission is accepted, we reserve the right to correct minor oversights in punctuation, grammar, or spelling. We will attribute you as author under the CC-BY-NC-SA license.   We may contact you if your submission is accepted for use. Submissions may be accepted and used at a later time. We cannot guarantee acceptance or date of publication of any submission.

By submitting your work, you authorize publication of your contribution in any or all of the following:

  1. CK-12 FlexBooks

  2. CK-12 Website

  3. CK-12 ePUB Editions (and other supported output formats)

For further information, you can also take a look at our Guide to Authoring a Science FlexBook.

By submitting to the CK-12 site, you are agreeing to abide by its terms of use. We want to make sure you are pleased with how your contribution appears on the site. If you have further questions, please click here.

To submit your contribution, click here. Please enter the type of submission in the subject line and attach your Word and/or zipped up art files. In the body of the email, please include a short description, the intended grade and appropriate course for your given attachment. If you are interested in donating other types of materials to CK-12, like a full-blown learning module, chapter, book, or a translation of something already in the CK-12 library, please contact us directly.

Note: Some ISPs limit the size of attachments. We suggest limiting the size to 10Mb or less. Please contact us directly if you’d like to submit documents exceeding this limit.

Your email address is held in strictest confidence according to our privacy agreement and used only to contact you with any questions regarding your submission or to let you know that your contribution was accepted.