The article is here. Of course a shorter summer "vacation" would help kids with continuity.
However, I think it's time that the entire structure of public K-12 education ought to be reinvented.
We started out with home-schooling, with tutors for the wealthy, then neighborhood one-room schoolhouses supported and controlled by the parents of the kids, then we went to the tax-supported, age-cohorted Prussian (yes, our public schools were based on the then-modern Prussian schools) factory model for the poor which we still use today in the US, while the prosperous (and the Catholics) used private schools. One size does not fit any, much less all.
Nobody cares what I think, but I do have plenty of ideas.
One of the first things I would do would be to eliminate the age-cohort system and, with that, those talented and gifted programs. Proceed at your own pace after demonstrating mastery of modules of study. The highly-motivated and bright move faster, the rest more slowly - or never. So what? Most kids cannot handle integral calculus but some kids are eager to tackle it.
Another would be to eliminate the huge summer vacation. It's obsolete. Give them August off, if need be. Why should kids have life easier than the grown-ups who take so little time away from their work and pay the bills for the supposed professional education?
Third, I would reintroduce technical training. The fancy private schools my kids attended have more technical training than the public schools have. Schools can take their pick: wood shop, metal shop, music shop, forestry shop, computer shop, kitchen shop, farm shop, garden shop, car and engine shop, construction and architecture shop, art and graphics shop, electrical shop, stone shop, ceramics shop, gun shop, etc. Few parents can teach all of these things, and the opportunities to integrate book learning - math, history, etc into real life tasks can be inspiring. If we had stone shop today, we might find another Michelangelo. Our kids' Kitchen Shop ultimately produced a Cordon Bleu four-star chef whose first task in Kitchen Shop was to understand sanitary dish-washing and the workings of a commercial dishwashing machine. Because private schools are non-union, the Kitchen Shop kids work in the school kitchen and take orders from the chef.
Fourth, I would get rid of the costly educational edifice complex. The building doesn't contribute anything. Any old empty mill building or vacant factory would be fine.
Fifth, I would bring back Civics. Every American needs to be taught how to be a citizen of a free republic. It's not easy to be one; it's all about man and God and law. Not all parents explain this plainly, or even by example.
Sixth: Sports. Every kid ought to do some team or individual sports as part of school or outside of school. Not just the athletically-gifted. America is a sports country. Builds character even if you are a spaz. Mens sana in corpore sano.
Seventh: Get rid of the unions. Teaching is a calling, not a factory job and definitely should not be a government job.
Eighth: Abolish the Federal dept. of Education. It's not their yob, and they are mostly idiots who could not change the oil in their car or hammer a nail straight into a 2X4, much less diagram a sentence.
I could go on and on, but that's a start.