When a user clicks on a map indicator, the school name (at minimum) should be a link to open the full description
It would be nice to have either a search next to the filter (so searching only within the city) or have the main site search maintain location. I expect a very significant % of your users will be looking at a single location, or at least one at a time.
It is a bit weird to start with a zoomed out view of a city and only have a few schools marked. Perhaps having lots of small indicators?
Might be interesting to hook in say sity or zip code demographic info from the census bureau
'Average household income' and other stats like it... I see a place for them on the site, but probably don't need to dedicate the screen real estate to them.
Just a few points from a quick overview.