summer school
US /ˈsʌm.ər ˌskuːl/
UK /ˈsʌm.ər ˌskuːl/

1.
zomerschool
a school that is held during the summer vacation, typically offering remedial or advanced courses, or recreational activities
:
•
My son is attending summer school to catch up on his math.
Mijn zoon gaat naar de zomerschool om zijn wiskunde bij te spijkeren.
•
She spent her entire summer school break studying for the exams.
Ze bracht haar hele zomerschoolvakantie door met studeren voor de examens.