Contact your instructor for details. Diskettes fail and e-mail fails. By Murphy's law, they typically fail when you least expect, and can least afford, such failures. Back up your data. Check for delivery of your e-mail .
Diskette failure is no excuse for late assignments.
When appropriate, class sessions will be supplemented or supplanted by guest lectures, by videos, or software or other demonstrations. Read all technical material with pencil and paper at hand. Every reading module has an accompanying homework assignment. I grade homework assignments on the basis of neatness and organization as well as correct answers. Display final answers and staple your papers in correct order before submitting them.