This study aims to examine the effect of the instructional plan which includes workshops pedagogically modelling the exhibitions at science centres for an effective field trip, on high school students' learning the concepts on 'Simple Machines: Pulley and Levers'. In this study, a semi-experimental design with the pre- and post-test control group was used in a combination of quantitative and qualitative data collection tools. In this study, which was conducted in physics courses for four weeks, according to the convenience sampling method, one control and three experimental groups consisting of 9th-grade students (n = 32). Four groups were created as: traditional teaching in the control group, a field trip to the science centre after teaching the subject in the experimental group 1, workshop after the field trip to the science centre in the experimental group 2, a field trip to the science centres after the workshop in the experimental group 3. Simple machines concept test and semi-structured interview forms were used as data collection tools in the research. The research concluded that field trips that were made with the instructional plan containing workshops pedagogically modelling the exhibitions in the science centre had a significant effect on the conceptual achievements of the students.