fifth grade
No la he escuchado desde quinto grado.
I haven't heard her since fifth grade.
— Perros de Reserva (1992)
Te saltaste quinto grado.
You skipped fifth grade.
— Casi famosos (2000)
Quinto grado, ¿no?
Fifth grade, right?
— Sed de Sangre (2009)
Está pasando del cuarto al quinto grado.
He is moving from fourth to fifth grade.