H2O is a suite of online classroom tools developed and provided by the Berkman Center for Internet & Society in collaboration with the Harvard Law School Library. H2O allows professors to freely develop, remix, and share online textbooks under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License (per the Terms of Service).
H2O is based on the open-source model: instead of locking down materials in formalized textbooks, we believe that course books can be free (as in “free speech”) for everyone to access and, just as important, build upon. Currently, H2O is geared primarily toward law professors, though the platform can be used across intellectual domains.