Less of that each year, going by test results.
On the other hand I hold standardized test’ partly to blame for the shortened summer. In Arizona now, many schools start closer to the first week of August then the first week of September. Since standardized tests are held on a fixed date, schools discovered that they could get an advantage by starting the school year earlier. Like the peacock and its excessive plumage fostered by competition, all schools and all children nwo bear the burden of a competitive device.
Interesting, isn’t it? Longer school years, bigger and bigger budgets, constant “improvements” in educational methods, and yet our children are getting worse test scores than ever.