This study intends to analyse the student's practicum competencies through Lesson Study activities by applying the Argument Driven Inquiry learning model which was studied using qualitative research with descriptive qualitative analysis techniques. The sample is 13 students in the fourth semester of physics education. Based on students’ practicum reports, the percentage of learning outcomes in the first Lesson Study was 70.91, the second Lesson Study was 84.83. The indicators of student practicum competencies include the competencies of synthesis, cooperation, communication and independence, each percentage gain is 41.03%; 47.12%; 54.49%; 45.77% in Lesson Study 1, and 77.56%; 82.69%; 78.85%; 76.92% in Lesson Study 2. Student responses to practicum competencies for each indicator are 80.13%; 83.33%; 82.05%; 78.21%. These show that there is a positive change in student practicum competencies and the reflection’s results show that there is an accurate prediction of the final measurement result and knowing how to obtain the right measurement outcome.

The sample of this research is MAS Darul Ikhlas Class XI with 30 students. The sampling technique was purposive sampling. The results of the study indicate that between the initial conditions (Pre-Cycle), Cycle I and Cycle II, it can be seen that during the initial conditions the average value of the class was 60.21, while the average value of the first cycle class had increased to 69.79. and in the second cycle it increased sharply to 81.67. The results of the study showed that there was an increase in student’s physics learning achievement after the treatment.