of secondary school
Él dejó los estudios cuando estaba en primero de secundaria.
He dropped out of school when he was in the first year of secondary school.
Estoy en segundo año de secundaria.
I’m in my second year of secondary school.
I am a high school student.
Este libro de historia está escrito para estudiantes de secundaria.
This history book is written for high school students.
Él es un estudiante de secundaria.
He is a high school student.
Que fuiste su profesor de secundaria.
That you were his high school teacher.