> San Francisco schools decided a couple of years ago that they would no longer teach Algebra in 8th grade.

This has nothing to do with this at all. We're talking about 4th grader literacy nationwide and you're talking about algebra in a single area in a different grade!?

The second point where there aren't enough teachers nationwide (10% missing workforce) is probably because teachers are terribly paid, disrespected, and subject to bad working conditions.

Maybe that's why people aren't clamoring to be teachers and the quality of work is low?