On January 21, 2021, Mrs. Sotheary Leang, a Biology teacher, conducted an experiment for students in grade 7 in the morning shift. This experiment took place at American Intercon School, Toul Kork Campus. In that lesson, the main objective of the lesson was about an experiment on Disintegration and Osmosis. During the lesson, the teacher divided students into small groups of 4 or 5 in order to practice doing the experiment which could help students learn both theory and practice. The experiment was going smoothly as expected. As a result of good cooperation between the teacher and students, the main objectives of the lesson were achieved, and the students find the lesson very interesting to learn.