"ثانوی" refers to the secondary level of education that follows primary education. It typically includes grades 9 to 12, where students are prepared for higher education or vocational training. This stage is crucial for developing critical thinking and specialized knowledge in various subjects. In many countries, including پاکستان and مصر, secondary education is divided into different streams, such as science, arts, and commerce. Students often take standardized exams at the end of this level, which can determine their future educational and career paths.