You should thank me for not sharing with you all the trite restaurant/school turnaround metaphors I have generated watching Ramsay's Kitchen Nightmares (side note: BBC Ramsay is hilarious; Fox Ramsay is an asshole.).
Anyhow, restaurants close with great frequency, particularly bad ones, sometimes ones that serve good food but don't manage the books, marketing, etc. well close too. This improves the aggregate quality of restaurants somewhat, but not so much to create an endlessly upwardly spiraling cycle of awesome sauce. Keep that in mind when considering the virtues of simply closing more schools more quickly. There are still plenty of towns and 'burbs in America where you can't find a decent, reasonably healthy restaurant, despite a century of merciless knife-point competition.