Review article 64 Isiksal, Mine and Petek Askar. 2005. The effect of spreadsheet and dynamic geometry software on the achievement and self-efficacy of 7th grade students. Educational Research, 47 (3), 333-350. This article investigates the effect of spreadsheet and dynamic geometry software on the mathematics achievement and mathematics self-efficacy of 7th grade students. It further examines the gender differences with respect to computer self-efficacy, mathematics self-efficacy and mathematics achievement. The study consisted of 64 7th grade students with equal number of female and male students. The evaluation used an experimental design where two software programs, Excel and autograph, were used in experimental groups separately, and a control group took traditional-based instruction without using any technology tools such as a computer or calculator. Three instructional methods of study: Autograph-based instruction (ABI), spreadsheet-based instruction (SBI), and traditionally-based instruction (TBI), were randomly assigned to the three classes. The mathematics achievement test was used to assess the students’ performance on mathematics. In order to determine the self-efficacy expectation of the students with respect to mathematics and computers, a mathematics self-efficacy scale and computer self-efficacy scale were developed respectively. Findings of the study revealed that the Autograph group and traditional group had significantly greater mean scores than the Excel group with respect to mathematics achievement. The Autograph group had significantly greater mean scores than the Traditional group, while no significant mean difference was found between the Autograph and Excel groups and between the Excel and traditional groups with respect to mathematics self-efficacy. No significant mean difference was found between boys and girls with respect to mathematics achievement and mathematics self-efficacy. On the other hand, boys had significantly greater mean scores than girls with respect to computer self-efficacy. The evidence suggests that students showed great enthusiasm for Autograph. Students in the Autograph group had the highest scores compared to other groups regarding mathematics achievement and mathematics self-efficacy. Keywords: Autograph-based instruction; Spreadsheet-based instruction; Traditional-based instruction; Mathematics achievement; Mathematics self-efficacy; Computer self-efficacy; Turkey.