The purpose of the study was to evaluate whether the lesson plan designed by the research team is suitable for teachers and students at Cai Nuoc High School, Ca Mau province, Vietnam. Data were collected through survey results from Google Forms and observations and lesson plan assessments from teachers participating in the experiment. The results show that the lesson plan designed based on the research team process is effective; it helps teachers save time and be more confident when applying it to the teaching process in the classroom. In addition, the lesson plan designed from this process not only helps students master the knowledge and develop competence but also practice many necessary skills such as problem-solving, creativity, communication, etc.