[rjb]

In the U.S. teachers are responsible for compiling 5-8 lesson plans a day. Multiply that number by the number of school days. Each lesson plan then needs to meet specific requirements that varies between state.

It goes without saying seasoned teachers will have a cache of lesson plans that they can, and do, pass along or sell. Why should one not be allowed to profit on the labor they already expended for an incredible service to other teachers?

This has already been "adopted widely", for decades, and the teacher-lesson-plan-community is an incredibly active and vibrant one. The countless lesson plan networks, online/offline, free/paid, are an invaluable service to teachers.

I find the negativity odd, that we as hackers, who create, build on, share, and sell our toolsets, would have a problem with this.