> let the faster person learn something else tangentially related If content someday emphasizes science as a richly interwoven tapestry, and heavily leverages

> let the faster person learn something else tangentially related If content someday emphasizes science as a richly interwoven tapestry, and heavily leverages implicit curriculum, this might become straightforward. The chemistry problem, that's also implicitly teaching cellular biology and supply chain dynamics, enables tangents on those too. The K-2 intro mittens, with tangents on thermal budgets, and spacesuit dexterity limitations, and winter camping clothing 101, and knitting how to, and so much more. If OP regrets our handling of current curriculum, there's seemingly an enormous additional level of despair available, in education's profoundly impoverished opaque window into the beauty of the world.