No abstract

In the learning process, students still have misconceptions although the concept has been taught by the teacher. One of the causes of misconceptions comes from the students themselves. The teacher often does not know that students have misconceptions because the assessment that has been given does not review the cause of misconception that occurs in students. Students have misconception especially in Abstract concept like in chapter Kinetic Theory of Gases. Because of that, this study made three tier diagnostic instrument test to diagnose student’s misconception in chapter Kinetic Theory of Gases. Moreover, it is also done an analysis in order to know the quality of instrument that has been made. According to the trials, the percentage of average internal validity is about 84.6% which means it is in proper to use and the reliability of instrument is 0.752, meaning reliable to use. This instrument used to diagnose the students’ misconceptions on chapter Kinetic Theory of Gases.

Besides conceptual understanding, students are required to have good critical thinking skills because critical thinking skills is one of the important goals in educational world. By having good critical thinking skills, students can solve problems especially in Physics easily. The aim of this research was to study student’s critical thinking skills after experienced interactive demonstration learning with web based formative assessment in static fluid. This research used quasi-experimental with one group pre-test post-test design. The subject of this research was students in grade XI of Natural Science class in MAN 1 Pamekasan. The result of this research showed that interactive demonstration learning with web formative assessment could increase student’s critical thinking skills in static fluid. Based on n-Gain score, the improvement of student’s critical thinking skills in static fluid included in the medium category. This happens on all three indicators of critical thinking skills that have been used, namely reasoning, argument analysis and problem solving.