The aim of this study is to examine the extent to which fourth-grade students transfer and use the critical thinking skills provided by curricula to daily life. The method of the research is an instrumental case study, which is one of the qualitative approaches. Typical case sampling was used in the study and 30 fourth grade students from 11 different schools in Ankara were included in the study. Fake news and semi-structured interview form prepared by the researcher were used as data collection tools. During the implementation phase, the students were shown fake news and asked whether this was true or not. Afterward, interviews were made using the Socratic inquiry method over the comments created by the researcher. The data were independently analyzed by two researchers and the themes were reached. In this study, the consistency between researchers was found to be %87,5. As a result of this study, it was determined that 92% of the expressions of primary school fourth-grade students were in the weak critical thinker category.