Abstract
The purpose of this study was to investigate the effect on students’ achievement of computer-assisted instruction (CAI) environment designed for quadratic function (QF). In this study was used a quasiexperimental method, which was a quantitative research approach. The participants of the study consisted of 30 tenth grade students from two different classes. SPSS statistical program was used for data analysis. Comparisons of the experimental and traditional groups were made by dependent samples t-test, while independent samples t-test was used for comparisons between the groups. Results showed that CAI was more effective than the traditional teaching method in terms of achievement. There was a significant difference between the QF achievement scores of the pretest and posttest of the experimental and traditional groups. This research was limited to the subject of QF in a mathematics course. Within the context of contemporary approaches, similar researches can be conducted on other subjects that are challenged in a mathematics course for the design and evaluation of learning environments based on CAI materials.