Restoring a file

[TechMonkey]

Ok, teacher has brought in a shiny Mac and apparently has been working all weekend on some moderation spreadsheet. Only problem is at the last minute she may have copied over the one she was working on, though she may have saved it else where. Not being a Mac person I have limited tricks to try, so far I have searched for files used in the last few days, & looked at the recent files list with no joy. Anything else anyone can suggest before I take the laptop back and make her cry?

[rolfea]

is she running on back up things such as time machine or anything?