Your assignment is 50 pages, minimum, by Sept 1. Extra drawings would only make you feel more comfortable with the techniques and will also become a great resource for ideas . You know how much time you can lose trying to think up ideas. If it makes you produce, I will also offer extra credit for every 5 extra drawings. 70-100 pages are usually the best deals.
Recycled paper saves trees yet are more expensive.
Art stores and Office supplies are good sources. Use any drawing tool with which you are comfortable, but use a soft pencil when you are warming up for gesture. Colored pencil or watercolor pencil also may be fun. Do not tear out pages. Keep all starts that don't make it as an assignment.