The purpose of this study was to determine opinions of mathematics teacher candidates towards applying 7E instructional model on computer aided instruction environments. The descriptive case study model was used in this study. The sample of the study consists of 52 mathematics teacher candidates which were selected randomly from Eskisehir Osmangazi University Department of Elementary Education students. Data were collected by “Applying 7E Instructional Model on Computer Aided Instruction Environments” questionnaire and a demographical form. The findings of this study have been evaluated within mean, standard deviance, maximum and minimum values as dependent to the descriptive case study model.