>The thing is that you have to adjust curriculum to the developmental stage of the INDIVIDUAL child.

While I agree with this, I suspect the social winds that led to this change, wouldn't put us on the path of creating individualized curriculum like you wanted. As gp mentioned, this change was motivated by social justice, and the same movement has called for getting rid of AP or other advanced material classes on the basis they're discriminatory (blacks/hispanics are underrepresented in them). I remembered a school district doing this sort of thing, but I can't find the link right now. That said, I did find a link of an entire province (!) dropping advanced classes under similar justifications: https://www.theglobeandmail.com/canada/article-ontario-to-en...