junior school
US /ˈdʒuː.njər ˌskuːl/
UK /ˈdʒuː.njər ˌskuːl/

1.
escola primária
a school for children between the ages of 7 or 8 and 11 or 12, typically following infant school and preceding secondary school
:
•
My daughter just started junior school this year.
Minha filha acabou de começar a escola primária este ano.
•
The junior school building is next to the park.
O prédio da escola primária fica ao lado do parque.