Ubuntu. How to clone a user and truncate the clone's rights?

Question

System administration

So ... There is a perfectly (for my taste) configured system for Xbuntu.
I don’t want to give it to schoolchildren for looting. I would like to let them in as Guests *, BUT with the right to write to a folder specially created for them.
*[When using a guest session, the user cannot read the home directories of other users, but he can use the system and programs. ]
Is it possible, and if so, how... I'm sure many school and university teachers will be happy with such functionality.
Thanks in advance...

Answer 1

zy SORRY for disturbing... The answer is found. Google knows best...
vasilisc.com/customize-guest-session-ubuntu