Education
Em que série você está?
Use série ou ano to talk about what school grade someone is in.
Meu irmão está na primeira série.
My brother is in first grade.
In Brazil, people generally use ensino médio to talk about high school. Older people in Brazil may use segundo grau instead. In Portugal, people say ensino secundário. High school in both countries lasts for three years.
Eu não te vejo desde o segundo grau.
I have not seen you since high school.
After high school, students can decide to go to a university, which in Portuguese is called universidade or faculdade.
Ele foi colega de faculdade do meu filho.
He was my son's college mate in college.