Hi Teach--
I don't know if you mean (but suppose) so that students can't re-enable it:
1) You can right click it or its icon>on right click context menu click
properties> uncheck start sidebar when windows starts. You can drag any
gadget off the sidebar and run it without the sidebar if you like.
2) I don't know how fast on the fly your students are-- it depends somewhat
but not entirely on age, but if you want to make them have to drill deeper
to find what you did, you can type
gpedit in run box>User Configuration>Windows Components>Windows
Sidebar>Right Click Turn Off Windows Sidebar>Put Radio Button in Enable.
Yes Redmond campus people do talk more funnier than most, so you're
"enabling" turning off windows sidebar. They talk real funny in the group
policy editor. I particularly like the "Classic Admin templates" in
multiple languages.
3) You could go to C:\Program Files\Windows Sidebar>right click the sidebar
application>right click it>properties>security tab>add all permissions to
the admin>then go to the compatibility tab>privilege level>run this program
as admin.
Good luck,
CH