My daughters were 7 and 9 when we moved out of Chicago where girls could not wear pants at all. They either had to tuck their dresses into their leggings getting them all wrinkled or wear the leggings under their dresses, which was difficult because they all had straps--no elastic waists then- The leggings had to come off before class. They were so excited when we moved to a school district that allowed slacks. I think the oldest was in 7th or 8th grade before they could wear jeans to school.