The site's primary function is to allow anyone to participate in community reading. Public or private groups can annotate ebooks together participating in discussions as they read. In addition, teachers can create in text quizzes, have their students write blog posts about the ebooks they read. One of the many great features is the easy group sign up (the ease of using a integrated Google login helps and having students join with a group code is ideal) - teachers can create private and public book discussion groups and build bookshelves for their classes. The bookshelves can be stocked via Google Books (some free ebooks are available), buy ebooks from Subtext (volume pricing will be available in the fall), or upload your own ebooks (see Greg Kulowiec great blog posted easy to follow directions here)
Rachel explained her favorite feature of Subtext: "I have always loved Web Linking because it connects books to all the amazing content on the web. We are also working on a feature called Tag It that allows teachers and students to highlight text and tag it as an example of a literary device or with a unique label like “Morality in Shakespeare.” They will eventually be able to export tagged notes to Google Docs for use outside Subtext. I think Tag It has huge potential."
Finally, Rachel also shared "we’re happy to buy a free book for any teachers (or more broadly educators) who want to read in Subtext this summer. We are putting whole faculties in the app right now. Nathan on our team just wrote a quick blog post on it:
I highly recommend checking out Subtext.