koodikoulu/koodikoulu — pull request #2 by lauripiispanen (2014-01-22 18:45:40+00:00)
Title: Add CC BY-SA 4.0 International license

This license does not prevent commercial usage, but all derivative work must be shared under the same license. So it's totally cool for you to charge for your code school, but we all get to share your cool improved material. ;)