Students don't actually rule Boston -- it just feels that way sometimes. Many museums, theaters, concert halls, and other establishments offer discounts for college and high school students with valid identification. Some restaurants near college campuses offer student discounts or other deals. Visiting students can check schools' and student groups' Facebook pages, relevant Twitter streams, and old-school campus bulletin boards for information about events and activities, many of which are open to them. The weekly Boston Phoenix also lists activities for students.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.