Book excerpt: There is a need to understand the factors correlating with teachers' instructional use of computers, because much of the present research focuses on students rather than teachers. This study examines several factors relating to the use of computers in the classroom by teachers. The factors examined include teacher attitudes, emotions, beliefs, and outside influences. This was done by a review of the present literature, administering two surveys, and analyzing the survey data. Questionnaires were distributed to faculty at five randomly selected high schools in a Midwest city participating in the study. Data from the survey was then examined to determine which factors correlate with teacher computer use in the classroom. The results of this study will help improve understanding of teachers' instructional computer use.