help with permissions without using ACLs
 

hey, im pretty new to linux and this is my problem

i have a directory called test and two groups called teachers and students.

the teachers group has to have read write and execute permissions for the directory test, while the group students can only have read access

and i cant use ACLs to make this happen so if anyone has any links or any information on how to accomplish this it would be greatly appreciated

Thank you =]

Well, in short. If you can't use ACL, then you don't ;)
In this scenario there will be a compromise. Either others get +r (And everybody can list the folder, including students), or others wont get +r, and no one can list the folder (Except from owner, teachers and root).