In this study, it is aimed to investigate and design the methodological foundations for the development of practical tasks in geography based on the effectiveness approach. The research was carried out in the spring semester of 2021-2022. The study with the participation of 360 secondary school students was conducted in a quantitative research model. In the study, 4 weeks of geography and activity training were given to the group of participants. In order to collect data, the 'effectiveness approach' data collection tool developed by the researchers was used in the study. The data collection tool used in the research was delivered to the students and collected by the online method . The analysis of the data was carried out using the SPSS programme; frequency analysis was carried out using t-test and the results obtained were added to the study accompanied by tables. As a result of the research, it was concluded that the group of participants had methodological foundations for the development of practical tasks in geography based on the effectiveness approach.