In NVA:
V games are 8 minute quarters.
JV are 7.
Freshman are 6.
MS can be 7 and 6 minute quarters (they just seem longer!
).
I do one Rec League where they have 9 minute quarters for the 16/18 yr olds and 8 minutes for the 13/15. They said they do this for the infamous "player participation rule." Causes parades to the free-throw line, numerous foulouts and long, long games!