We have given an orientation for international students at Penn State for a number of years. We organize this in conjunction with the international students office on our campus. We start with a general introduction to the library (how to check out books, our ask a librarian service, course reserves, etc.) and brief info about our catalog and some of our databases. We also talk about our collection of international newspapers. Each student gets a raffle ticket and we hold a prize drawing for a t-shirt, coffee mug, etc. The students then go with a subject specialist librarian to the subject library corresponding to their major or discipline (engineering, business, etc.) for a tour and general info.
We are a very large institution with close to 4,000 international students, so your situation may be somewhat different, but I hope this helps. Feel free to contact me for more info.
Dawn