I mean I can't share my work with the other ELA teacher since there isn't one. It's satisfying to me to see my work in a public domain. I know I will have feedback from my colleagues. Not all of it is A-1 material, but it is something. Schools spend quite a bit of their moneys on educational resources.
Teachers often buy teacher-created materials, reference books, workbooks, etc.
What I have discovered is that many do not match up with my expectations. Yes, I do take ideas from here and there. Some of the activities are right on the mark. Instead of spending money on these materials, I create my own, tailor made for my classroom. It takes more time, but then, I'm not wasting money that I'd much rather spend on updating the novels used in the ELA program.