Part of my job is creating learning materials (such as example questions) mostly for first year undergraduate students in engineering. I find it difficult to believe that there are not free online resources for example questions based on topics. It is crazy to think that every time an institute wants example questions they have to make them from scratch, instead of having an online place for people to post.
MIT OpenCourseWare has some assignment materials, however you cant search by topic (e.g., search for "eigenvalues"). Also, there aren't many assignments per topic (and some require you to have the book which defeats the purpose).
Is there anything similar out there I could use to get examples from and even put my own examples out there for others to use?
(Keep in mind it has to be official, I know there are some places where students can upload materials from their courses, but those are usually not done with permission.)