Classroom Edition users: When you use the Create student floppy disk command, the floppy disk created is actually formatted in Macintosh format. This means that you will get an alert that says The disk in drive A is not formatted. when you try to directly access files on it under Windows. There is nothing wrong with the disk, it is simply in Macintosh format.
You can use the File transfer... command in the Special menu to transfer files to/from this floppy disk when running the Windows version of JWM.
The benefit of using Macintosh format floppy disks is that the same floppy disk can be inserted directly into any type of computer running JWM and it will work.