ABSTRACT
The critical thinking skills of elementary students requires more comprehensive research. This research aimed to develop the critical thinking ability of students through thematic learning charged natural science use with a guided inquiry model at elementary school. The research subjects were 30 students from five classes at the Elementary School of Giwangan. The research design used a classroom action research cycle model that repeatedly and sustainable. This activity consists of (1) identification of problems, (2) planning, (3) learning implementation, (4) observation and reflection, and (5) conclusion. The data collection methods used to test, observation, and field notes. Data were analyzed descriptively quantitatively and qualitatively. The results showed that there was an increase in pre-cycle critical thinking skills reaching 53.87, increasing in the first cycle to 62.23, then in the second cycle reaching 78.50. The second cycle has met the success criteria determined by the class average at ≥ 75, so it was stopped.
