The need to use computers in the teaching and learning process in order to improve performance in mathematics is critical and needs urgent address. The traditional use of chalk and chalk board in the classroom is outdated. This book provides an investigation of the perception of teacher trainees towards the use of computers in mathematics instruction in secondary schools in Kenya. Specifically, the trainees attitude towards use of computers, their competencies in computer use, and other factors hindering use of computers in mathematics instruction are highlighted. A descriptive survey was adopted for this work. The target population was teacher trainees of mathematics at Kenyan universities. The instruments for data collection were the questionnaire, and face to face interview schedule. The data collected were analyzed using descriptive and inferential statistics. The analysis sheds some light on the quality of training offered by teacher trainers to teacher trainees. This book is therefore useful to teacher trainees, teacher trainers, ministry of education, curriculum developers and other education stakeholders who embrace adoption of new technology in the classroom.