Last week I applied for Co-op position at a company, they requested that I address the cover letter to someone on the online posting. This week I received word that I would have the interview, and I am just fixing up the portfolio. I was also notified the name of the person who is going to be interviewing me. Should I change my cover letter that I sent to address the person who is going to interview me, as they are different people? Also do I change the contents, or does the employer expect one to have the exact same cover letter on them as which they applied with. I am wondering because it might be weird if I bring my cover letter addressed to another person when my interviewer is really someone else. Thanks alot!
Typically, if I'm bringing application documents for an interview, I'd be bringing them for reference, or for interviewers, if they've not got enough copies.
To that end, you're better off having the same documents you sent previously. They're not going to look through a new document, but they might glance at a copy of one they've been through before for reference.
I think you're overthinking this. You've already written the cover letter and since it's already done its job (i.e., gotten you the interview), probably no one will do more than glance at it anyway.
On your resume, if you have additional information that you think would be relevant to the position and that was NOT in the resume you sent, you could certainly update it.
However, most hiring managers will have already reviewed your resume by the time you get to the interview. The last thing you want is to have them searching the new copy for changes during the precious time you have to impress them in person. I think you'd be much better off focusing on the interview; if the info you left off comes up in the natural course of the conversation, you can tell them then.
By all means, bring a portfolio of your school projects for the hiring manager to review. I would not, though, insist on giving them a tour through the entire portfolio unless they insisted. It's that same "you only have a short time to impress" bit as with the new resume.
Instead, you can set the portfolio in front of you when the interview starts, find an opportunity to use one of your projects as an example, and use it then. If the interviewer wants to see more, they'll ask. Be prepared to leave your portfolio with them for a few days if requested. I usually put my CV on the inside cover of the portfolio.