Onehotspur61

I've got 10 generic android tablets running 2.3. They good value for money but my main problem is connecting them to school wi fi via a proxy server. Does anyone know if there is an app/software I can download to let me do this. They connect to wi fi outside school no problem. I have a Motorolla Xoom which runs on 3.2 or higher that brings up the menu to allow to put in the proxy server settings. Can anyone help?