I'm trying to find public domain e-books of English language teaching material that I can adapt into online courses.
As a lark, I'm planning on adapting some old (think vintage) language learning books into online courses. Part of this is just curiosity about how older material will look in a digital format (for example, adapting this old book
), another part of it is a desire to use public domain material to create sellable courses that have some pedagogical quality. It's mostly an experiment.
I have a few questions related to this:
1. What's the easiest way to find public domain e-books for learning and teaching English? I've done a bit of searching on Google books but I was wondering if there were some particularly good search terms or other online resources that would have these. Ideally I'd love to have some books with grammar / vocabulary exercises that I could use.
2. Is it a matter of publication date? I.e., can I rely on books from a certain time period to be public domain? What's the latest time period I can use?
3. What are the usage rights for this sort of material? Is it possible to take, for example, a language learning book from 1920 and use the material for profit?
I'm a newbie to all this, so help is greatly appreciated!