We were actually required to create a portfolio in my program. It's basically a 3 ring binder. We were required to create a cover art for it with the name of the school, our name, grad year. I'm leaving it as such. We had to create a table of contents.
In it we have sections divided and tabbed for projects (teaching plans, care maps that you mentioned). We were required to write 3 main short essays(3-5 pages) of why nursing, what it means for us, and what we saw our goals to be. As others have mentioned, I plan to just give them copies of those so they don't feel that they need to sit there and go through it, plus I want them to see "who" I am, my papers do back up what I'm prepared to tell them about myself.
I also have my honors certs, my ACLS, CPR and also importantly I think, is our skills checklist. That way they can just see upfront as I have stated on my resume, list of skills provided on request. We also have instructor commentary as we were always required to have some new addition each semester. There's also a section for misc. skills such as computer and and section for CEU's.
Overall I wasn't sure I would use it as to me it almost came across as a dorky looking "brag" book.
But seeing what seems to impress interviewers, I've been told those that use it, they are impressed and true, all the info is right there.
Oh and I have sheet protectors over the pages to make for easy flipping!