How many hours of sleep should an average 5th grader get each night?

how many hours should each age group have of sleep every night on average
what about curfews

approximate ages in every grade level
5th 10-11
6th 11-12
7th 12-13
8th 13-14
9th 14-15
10th 15-16
11th 16-17
12th 17-18
the ages may be a bit different
it is just a brief list
14 answers