This source provides links to textbooks that you can reuse and adapt in a variety of fields including. Browse their Bookshelves to see what they offer in your discipline. This cite also has archived courses that often include assignments that you can adapt.
COERLL's mission is to produce and disseminate Open Educational Resources (OER) for the Internet public (e.g., online language courses, reference grammars, assessment tools, corpora, etc.). The term OER refers to any educational material offered freely for anyone to use, typically involving some permission to re-mix, improve, and redistribute. Thus, COERLL seeks to promote a culture of collaboration that lies at the heart of the Open Education movement. In addition, COERLL aims to reframe foreign language education in terms of bilingualism and/or multilingualism. As such, all COERLL resources strive to represent more accurately language development and performance along dialectal and proficiency continua.
As a project in the National Science Digital Library (NSDL), the ChemCollective's goals are to support a community of instructors interested in improving chemistry education through interactive and engaging online activities.