Total time for which the school lasts = 6 hours 30 minutes
Recess time = 30 minutes
So, total duration of classes = 6 hours 30 minutes - 30 minutes
= 6 hours
Duration of classes in first half = 6 ÷ 2
= 3 hours
Time at which at the recess ends = 08:00 + 03:00 + 0:30
= 11:30 am.