Conditions in which pupils are taught (5)
I believe the answer is:
terms
I believe this clue is a double definition.
'conditions' is the first definition.
('term' can be a synonym of 'condition')
'in which pupils are taught' is the second definition.
(as in school terms)
(Other definitions for terms that I've seen before include "Conditions; fee" , "Academic periods" , "Opportunities to study" , "when schools should be open" , "Work periods" .)