Electronic Communication Media have been in use in education, and other sectors in Kenya and many countries for many years. However, while evidence shows a dramatic increase in investment in Electronic Communication Media hardware and software, there is no clear empirical information on their professional use in Kenya schools or indeed other countries in Africa. Hence, this study investigated the professional use of Electronic Communication Media by teachers in Kenyan secondary schools. The specific research questions were: What are the teachers' perceptions on professional use of Electronic Communication Media in secondary schools in Kenya? How are Electronic Communication Media used by teachers in secondary schools? What issues influence teachers' use of Electronic Communication Media in secondary schools in Kenya? The study was done in Machakos County. A mixed approach was used where both qualitative and quantitative data were concurrently generated. A sample of 59 schools, drawn from all the eight districts of the county was taken involving a total of 227 teachers in the quantitative aspect and Four purposively selected principals in the qualitative bit.