iSchools is a directory of over 135,000 schools and colleges in the USA. Using iSchools.mobi from your iPhone or iPod touch shows information on public and private schools (pre kindergarten thru 12), and colleges and universities in the USA with a friendly format. You can either browse to the school you are looking by location for or use the search feature. The details for each school include Address, Student Population breakdowns by grade, race, as well as Number of Students and the Pupil Teacher Ratio. Must be using iPhone. Try it here