It may be too soon for students to be showing up for class with popcorn and gummy bears, but technology similar to that behind the 3D blockbuster movie "Avatar" is slowly finding its way into college classrooms. 3D classroom projectors are taking students on fantastic voyages inside the human body, to the ruins of ancient Greece--even to faraway galaxies. Even so, colleges and universities have been slower to jump on the 3D-projector bandwagon than K-12 schools. This is probably due to the fact that more 3D content is currently available for the K-12 market. A final hurdle to broader implementation of 3D projectors in higher education is one with which educators are all too familiar: budget issues. In these difficult economic times, it's tough to justify spending money on perceived frills. While 3D-ready projectors are not significantly more expensive than traditional projectors, many schools are likely to phase them in only gradually, as part of their normal equipment-replacement cycle. Even so, additional money is required to purchase auxiliary 3D equipment, including screens and glasses. (Contains 1 online resource.)