Özet:

According to the purpose of making, experiments can be gathered in three main groups, including closed-end experiments, open-end experiments and hypothesis testing experiments. In open-end experiments, the student is given only the use of the tools and the purpose of the experiment. The experimental stages, the establishment of the experimental arrangement, the collection of data, the interpretation and the finding of results are left to the student. The study is aimed at determining the opinions of graduate students about open-end experiments with the help of experimental logs. The study was carried out with the participation of 40 students who are studying in the 2nd grade of Science and Knowledge Teaching. Open-end experiments on geometric optics were conducted with students for 6 weeks. After each experiment, students were asked to express their views on the phases of experiment preparation and experimentation through experimental logs. At the end of the application process, 7 students were held semi-structured conversations. The data is divided into categories by quality analysis and the frequency values are obtained. From the findings obtained, it can be said that students do not have trouble understanding the theory of the experiment, but they have trouble setting up the arrangements of the experiments they design, especially during the application, in getting data.

Anahtar Kelimeler: