BetterLesson was founded by a group of teachers from Atlanta and Boston public schools to connect educators and help them create, organize, and share their curricula. BetterLesson is focused on aggregating and scaling the most innovative content and practices from high-performing teachers across the country.
All of the curricular content on BetterLesson (courses, units, lessons, files) are user-generated. The default sharing license for content is CC BY-SA, and 99.99% of the content shared by teachers on BetterLesson is shared with one of the Creative Commons licenses.
Creative Commons is the most commonly used license framework in the Open Educational Resources (OER) movement and so was the natural choice for BetterLesson.
Creative Commons licenses harmonize well with the general sharing culture amongst teachers. Many teachers feel comfortable sharing curriculum with other teachers with the knowledge that it will be used to help teach students in another classroom. Attribution, or "shouting out" other teachers, is another key piece of the sharing culture amongst teachers.
BetterLesson's welcome video for new users: https://vimeo.com/48262241