Anytime you encounter a genre new to you, like the portfolio, research it online. There are numerous sites which deal with the Freshman English portfolio, and a few minutes spent doing some research on these sites can provide some valuable ideas for your own. You'll also be learning to research genres, not an inconsiderable skill. You also might want to look at the "reflective cover letter" or "reflective learning."
It's funny how many folks will research the right stereo or computer to buy, but it never occurs to them that they can research how to write better and things like genre or how to conquer sentence fragments.
Write with questions.