No you don't misunderstand :p My teacher first did it wit Office 2003 and know i must do it in office2010.. and i also thought it was a stupid idea.. But who am i... i have not much knowledge in IT.. i'm still learning.
But i have 2 options
To confince him that this is not a good idea... (and i dont know with wich argument)
or find a way to do this...
Hmm, so, I think that kind of crazy was possible with very old versions of Office, which could be "advertised" via GPO to achieve per-user scenarios, but Office2007 and later versions, don't provide such different per-user options as part of setup.
Office2007 and later, uses the MSPfile etc for customization, and that is per-machine (common to all users of that machine).
You might be able to achieve something similar, by using AppLocker (e.g. AppLocker rules which deny excel.exe to be executed by GRP_Students).
But this doesn't address the matter nicely, because the Students can see the Excel shortcut/icon/program, but are forbidden to execute it.