This study aimed to reveal the experiences of science education graduate students about education in out-of-school learning environments before and after they took a course on this topic. The study group consisted of four students who were attending the science education graduate program at a state university in Turkey and who were taking the "science education in out-of-school learning environments" course. In the study, the students answered seven semi-structured, open-ended questions that were prepared by the researcher at the beginning of the semester. Then, they took the 16-weeks course and answered the same questions at the end of the semester. The interviews were recorded using a voice recorder. Data obtained was analyzed using the descriptive analysis method. The findings of the study showed that at the beginning of the semester the graduate students did not have any scientific knowledge about out-of-school learning environments and that their answers to questions did not go beyond presumptions. On the other hand, the students' level of knowledge about out-of-school environments was observed to increase after the intervention.