haha this happened to me but it was purely my fault.
i catch the bus to and from school. and this happened to me in year 11. so it was not as important but quite important if you get what i mean. however, i just had an afternoon lesson, so i was pretty damn tired by the end of the day. so i got onto the bus with my folder in my hand.
it wasn't until about later about 4 hours later when i was checking whether i had any homework, did i realsie i'd left it on the bus. so then i just went fully panicked. everything was in that damn folder; sheets, work, the lot.
i phoned the bus company, and lucky it was found on the bus. the next day, my dad went down to bundeena, from bexley, just to retrieve that confounded folder.
the lesson, don't carry arpund your folder unless you have a very good memory. another conclusion that you cn make is that i am very forgetful.