Senior secondary refers to the final stage of secondary education, typically encompassing the last two years of high school. In many countries, this stage is designed for students aged 16 to 18, preparing them for higher education or vocational training. Students often take specialized courses that align with their interests and future career goals. During senior secondary, students may also participate in standardized assessments, such as the SAT or ACT in the United States, which are important for college admissions. This period is crucial for developing critical thinking skills and gaining knowledge in subjects like mathematics, science, and literature.