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Or, universities should forbid any teacher from requiring the purchase of any book Having it as a reference? Sure. Requiring its purchase for a semester, as in

Or, universities should forbid any teacher from requiring the purchase of any book Having it as a reference? Sure. Requiring its purchase for a semester, as in, your grades will depend on it? No no

6510 3y ago
Exactly, lets take it a step further and forbid selling (teaching) things you don't own. If I desire to charge people to teach them what an array is I must provide the explanation of the array myself. If the book is really to good to skip a teaching license must be acquired that names the specific chapters and their purpose. The rights holder doesn't have to sell by chapter but if anyone wants to make a more specific version at a better price they can. Ideally work towards a single book for each year with a wiki for educators to debate changes and updates.