In order to type a paper for your class, on your Macbook, you would need a word processing application, in order to accomplish this. The most commonly used application, believe it or not,is Microsoft Office for Mac 2008 or the earlier version, 2008. However, if you don't have a copy of either and do are not moved to shell out several hundred dollars or more, I have another option for you.
Try Open Office for Mac. It is free and it does not take long to set up on your Mac.
Here are two key links for you to review for more info
FAQs about Open Office (Aqua) for Mac Download Open Office for Mac OS X (Intel) AquaThe word processing application you will need to use in Open office, is caller Writer" and it saves in all the formats that are readable in Microsoft Word for both the Mac and the PC.
If you have more questions on using this open source free software, please let me know. Always glad to help!
Regards,
-Mactechtrainer