Purpose of this study 9 In geography class, the effects of computer-aided learning environment, on student achievement and attitudes is to examine. Experimental research, methods is a mixed model. 200 who attended private schools 10th grade students with achievement test and attitude scale for computer-assisted instruction applied geography.. Application size of the study during the academic year 2007-2008 in Izmir Bornova Anatolian High School, conducted a total of 5 weeks with 10 hours. 30 to the experimental phase of the research in the experimental group, 30 in the control group hada total of 60 students participated. Descriptive statistical techniques used in research. Cronbach alpha was found to be 0.94 degree. 53-question test was used to study success.Pre-test and post-test achievement scores and attitudes to be significantly different between (P <.05) because of computer-based teaching methods on students' achievement in geography lessons can be said to increase confidence level.