[K12OSN] Permissions Question

[Jim Hays]

I am almost embarrassed to ask this question, but since I have never met 
any of you face-to-face, I guess I can ask a "dumb" question.

Scenario: (K12LTSP server as a file server for the school. Term Server 
is a different box.)  Middle School.  Student Home Folders in /home 
partition.  Folders in subdirectories by graduation year.  For example, 
a student named Joe Cool in the class of 2008 has a folder 
/home/students/2008/coojo08.  His username is coojo08.  Folders are 
owned by the student and the group for the folders is teachers. 

The problem:  When a student creates a file in his/her folder, the files 
is "owned" by the student as owner and by the student as group.  I need 
to have the group for these files be teachers. 

What do I do to make it so that files created by students in their 
folders are accessible to teachers who are in the teachers group? 

Here is what a file looks like now:

-rw-rw-r--    1 woobr08  woobr08     21504 Apr  7 10:13 Stocks.xls

I need it to be

-rw-rw-r--    1 woobr08  teachers      21504 Apr  7 10:13 Stocks.xls

TIA for any advice.