I'm not exactly sure what your exact situation at your school is, but LC II's won't add much to a server environment (nor will the parts really) and they are a bit pokey for general word processing use and stuff of the like.
Our school had a bunch of LC II's that they were throwing away because of this exact issue, and I lobbied for them to save at least a few of the machines to use a experimental systems to try out different forms of UNIX. There were several students (myself included) who had a great interest in higher level computing, but we lacked the budget to buy a dedicated UNIX workstation or even the parts to build one. LC IIís are fully supported under NetBSD, and I even had a very version of MacLinux68k running on one system that had a whopping 6MB RAM(!)
If this idea fits into your school, my suggestion would be to find someone who might have the knowledge or interest to install a version or two of UNIX OSís on the machines, and see what interest you can garner. If someone messes up a machine or two, it wonít cost you anything, and the experience is priceless. UNIX experience has been and still is a very important skill, and I learned a great deal from free hardware that our network administrators were going to just throw away
otherwise, send them to me (seriously).