Student lost all files

In level 7b, a student lost all of the files that were given to him . All he has is the index.html
He doesn’t have the css sheet, the crane, mouse and pig pictures. He tried to start over and lost them. How can we get them back?

I’ve had this happen before and usually using the Version History and selecting Start Over does the trick. If that’s not working, you may want to try having the student clear his cache and cookies, log out of and try logging back in. I find I have more issues like this when my students are using their Chromebooks for some reason or another.