The FCC has conducted a survey (this is a RWW summary, but the summary provides a link to the full report) related to those schools who purchase at least some proportion of their broadband access using e-rate funding.
However, nearly 80% of all survey respondents say their broadband connections do not fully meet their current needs. 55% say that slow connection speed is the primary reason their needs aren’t met. 39% says that cost of service is the major barrier to meeting their Internet needs. 27% cite installation costs as the barrier. Rural schools and libraries, in particular, struggle to provide adequate bandwidth to their users.
This report provides some additional data concerning how schools make use of the Internet.