Use RTF files for guaranteed compatibility
Some of you are having problems sending your documents as attachments. Or, your instructor is having problems opening those attachments because she doesn't have the same word processing document as you do.
This set of instructions will explain how to change those documents into another format, RTF, which is a more generic, common format that is readable by almost all computer systems.
If you don't have this option listed in your word processing program, then use the Text Only (*.txt) option. This will take away all your paragraphs, indents, bolds and italicized formatting, but the words at least will appear.
Your instructor will be able to open either of these options, whether it came from a Mac or a PC, from most other programs.