Tech know-how
Another barrier to entry might be a lack of expertise. One way to lower that barrier to entry is to make the process of logging on to the school network, and then using it purposefully, very easy. In my case I did the following:-
Installed a menu system on the front end so as to make it easy, once you had logged in, to select the task you wished to perform;
Wrote a manual that had instructions on how to use one application per page, with one manual per computer;
Posted how-to notices around the computer rooms;
Stuck a card containing the login details on each computer.