Mathematics course description for high school seniors: With two years of experience teaching high school seniors in Morocco, as well as students in Paris and Troyes, I have had the opportunity to work with renowned organizations such as Anacours, Acadomia, and platforms. These experiences have allowed me to develop strong expertise in teaching mathematics. I begin each session with an activity in the form of a targeted exercise, which helps build the course content progressively and illustrates key results. Then, I present the main theorems of the chapter, followed by practical examples to ensure students fully understand the concepts. At the end of the chapter, we conduct a detailed summary to recap the topics covered. Finally, we approach exercises and tutorials progressively, with an assessment in the form of a mock exam to measure the student's progress and consolidate their knowledge.