I happen to think that the most important change we could make to improve public eductaion would be to do just that and go from the 180 day school year to a 200 day school year.
I see your point, but do you realize how much that would cost? We have to buy more teacher hours, find stuff for kids to do for an extra twenty days, and the camp organizations would be ticked about losing millions of dollars and would offer resistance.
Personnel costs would increase by about 20% I figure, as since it would cut into the ability of teachers to do the required continuing education during the summer, they would need to take some quarters off. Building costs would be about the same, as there would be no need to build new facilities, as schools lie largely unused during the summer months. Other groups that depend upon the long summer break would also be unhappy. The Myrtle Beach area merchants are already unhappy that as a result of when the year-end exit exams are given, most schools in the state start up in early August so they can get in as many teaching days as possible in before the test day. They definitely don't like school starting before Labor Day. However, it has definitely been shown that going to a 200-day school year would help children to learn better, and isn't that what is really important?