Two high school mathematics teachers who use Interactive Whiteboards (IWBs) in the classroom were interviewed annually over the course of three years regarding their perceptions of the technology. The findings indicate that IWBs provide some of the same benefits as the multitude of computers and other technologies available in ACOT classrooms: increased student motivation, more dynamic instruction, and greater teacher collaboration. Unlike the ACOT technologies, however, IWBs did not lead to the implementation of more project-based instruction.