A Personal Tribute to Cliff Beevers OBE

I have known of Cliff’s work since the mid-1980’s when he started the CALM project (Computer Aided Learning of Mathematics) but did not get to know him well until the early/mid 90’s. When he began the CALM project it was difficult to attract recognition and funding for research and development in this field. Cliff’s achievements with CALM must be viewed in this context.