> As a former student and now a parent. I have no idea why we need to recreate math books over and over and over again. Seems an incredible waste of resources.

> As a former student and now a parent. I have no idea why we need to recreate math books over and over and over again. Seems an incredible waste of resources. The fundamental material doesn't change. The way we teach the material changes, for valid reasons: 1. We can get better at teaching it. (Optimistically). 2. We might need to update textbooks for more up-to-date references. Even if it's not political ideas, textbooks might reference things that are not relevant (or not reference things that are). 3. Whether or not they are better, sometimes new ideas of how to teach material are created. E.g. new math etc.