print it out or just ask for him\her to give you it back after she grades it. she isnt going to steal it. and if your paranoid than get a 512mb or 256mb one
although a floopy drive is cheap, it is exactly that. soon the disks that have data on them will lose their luster, and the seek time is not that good.
unless you are just saving documents, then it's ok to go with a floopy.
otherwise i would go with a usb drive for storage..and they are getting cheaper in prise too.
Or just email it to your teacher
At our school we couldnt realy hand the work in on floppy disks cos not all the teachers laptops had floppy drives neither did all the computers