In this work, I propose to investigate the development of thinking and scientific thinking in activities of physics undergraduate students at UFSCar. The investigation was carried out from the monitoring of the discipline of Instrumentation for the Teaching of Classical Physics during nine weeks of class. During this period the students were submitted to a series of activities that were analyzed as the perspective of microanalysis. We identified and characterized the students' actions and interactions by relating them to scientific thinking and thinking. We conclude that there are activities that provide greater development of thinking and scientific thinking with the improvements performed in physical experiments. On the other hand, we found that other activity contributed little to the development of thinking and scientific thinking such as the evaluation of seminars.