Educational suite for Linux?

[Brad Thomas]

Hello everyone.  I have recently setup an Edubuntu lab for the small 
school we have here on campus.  Everything has been going good with it 
so far, however, the higher ups are starting to take a look at replacing 
the lab already and using a software suite that is Windows based called 
PLATO (www.plato.com).  Is there anything like this already that is 
available under Linux?

Thanks,
Brad