logout problems

[ioafa...@gmail.com]

Hello there,

 Without logging in  or save ,if  a student write some code in DRAW, next time (after shutdown)  in this computer another student see what the last one had done.

Another problem I have is that, when I logout, it's not done. I still see my folders and I can continue even though i logged out. Logout it's happening only if i close the tab. 

Please help