Augmented reality is defined as a technology in which real world and virtual objects are combined with a simultaneous interaction. The aim of this study is to determine the effect of augmented reality use on students' achievement, misconception and course engagement. A (matched) quasi-experimental research design with both pretest and posttest control groups was used in the study. The sample of the study consisted of 118 seventh grade students receiving education in six different classes. The students in the experimental group took their lessons with an augmented reality learning material, while the students in the control group continued using their traditional course materials. An achievement test, a misconception test and the student course engagement questionnaire were used as data collection tools. As a result of a 7-week implementation, this study found that augmented reality technology increased the achievement level of students and eliminated their misconceptions. However, the study also found that augmented reality technology did not affect the course engagement of students.