Özet:

With the revision of the Science course curriculum in 2018, some subjects in the curriculum have changed in terms of grade level and scope. This situation has led to the need for new measurement and evaluation tools that measure objectives are suitable for the curriculum. The aim of this study; to develop a valid and reliable measurement tool for the subjects and concepts of the secondary school 7th grade "Pure Substances and Mixtures" unit, suitable for the acquisitions in the curriculum. For this purpose, firstly, the gains in the Science course curriculum were listed and a test consisting of 40 items that can be used by researchers and teachers was develped to measure the high-level mental skills of the students. A table of specifications was created in line with the relevant unit topics and objectives. In addition, the content validity of the test was ensured by referring to the opinions of two faculty members and two science teachers in the field of science education. The Pure Substances and Mixtures Unit Achievement Test (SMVKÜBT) was applied to a total of 358 eighth grade students in six secondary schools in Amasya in the 2018-2019 academic year. While determining the sample, maximum diversity sampling method was used. As a result of the analysis, the KR-20 reliability coefficient of the test was found to be 0.85. The average item difficulty (Pjx) of the test was calculated as 0.45 and the average discrimination (rjx) as 0.43. As a result of item analysis, four items that were found to have low discrimination were excluded from the test. The final version of the test consists of 36 items. As a result, a valid and reliable achievement test has been developed, which is thought to be useful for both researchers and teachers.

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