Mention some of the topics you'll be covering in the future, even if you don't have specific library-related requests. Your librarian might surprise you with great literature-based ideas to improve your plans. You'll show that you appreciate your librarian's expertise and round out your resources. Keep an open mind. You'll want to be flexible.
All libraries have strengths and weaknesses.
Having inflexible expectations will make you focus on how the librarian can't help you. Instead, focus on the ways your librarian can help. Chances are, you'll get more than you asked for, more than you thought you needed-and more than you ever dreamed of. Get your librarian involved with your projects early. Giving librarians ample notice can turn an impossible request into an exciting challenge and improve opportunities to enhance your lessons.