supplementary classes
noun phraseUK /ˌsʌplɪˈmentəri ˈklɑːsɪz/
US /ˌsʌplɪˈmentəri ˈklæsɪz/
Extra classes you take to learn more or get help with school subjects.
She takes supplementary classes on Saturdays to improve her math.
OTHER MEANINGS
2. Lessons that add to a main course to give students more practice.
The school offers supplementary classes in reading for younger students.
3. Classes taken outside regular school hours for extra learning.
He attends supplementary classes in the evening to prepare for exams.
4. Extra teaching sessions provided to help students catch up.
Students who fall behind can join supplementary classes after school.