The aim of this study is to develop an achievement test for 7th grade students. The lack of a current achievement test to measure spatial ability at the 7th grade level led to the emergence of this study. For this purpose, firstly, the acquisitions related to the 7th grade "Views of Objects from Different Directions" topic were examined, the literature was reviewed and 84 questions were prepared. After expert opinions were taken, the number of questions was reduced to 64 by making the necessary arrangements. The validity and reliability of the 64-question test were examined, and it was applied to 139 7th grade students in the 2022-2023 academic year as a pilot application. According to the results of the item analysis conducted with the TAP program, the final version of the 25-question Spatial Ability Achievement Test (SATT) was given by taking expert opinions. While the average difficulty index value of the achievement test was 0.647 in the pilot application, it was found to be 0.540 in the final version of the test. The KR-20 value of the reliability analysis of the achievement test was found to be 0.918 in the final version of the test while it was 0.848 in the pilot study. As a result of this study, a 25-question, four-choice multiple-choice achievement test with validity and reliability was developed.

Achievement test, spatial ability, reliability, validity, test development