... in an educational context. The most dominantphysical form of learner-machine interaction today in education is a very old-fashionedoperation developed in the nineteenth century, and requiring ... buttons.However, other forms of interaction possible with a computer include drawing,speaking (voice recognition), gesturing, and singing. It is surprising that these otherforms of interaction are still ... outside of the classroom,or to research sources on the Web and in the library. The instructor becomes more of atutor and a guide, and less the main source of information. Finally, an increasingnumber...