My son attends a European school. They do things a bit differently than in America. Here, the girls start pointe between age 9 or so. yes, I know this is an unpopular thing due to the growth of the foot, strength, etc. They are fitted with a special trainer shoe. They only wear them for 15 minutes at the end of the class at the barre. Classes are only 3 times a week.
For at least 2 more years, they only wear pointes for the 15 minutes. Classes are 5 days a week. By the time the kids are around age 12, they progress to pointes during the entire class and take special pointe classes in addition.
This school also makes the boys wear pointe shoes (black canvas) during one of their years of training. This is also an un popular idea in America. I felt it was important for his training. He learned that these shoes are super painful, require special strength, and a new sense of balance/center.