Mountain skiing is a demanding endeavor that needs to be taken seriously. Megeve has pistes for both pros and beginners. But ski instructors are essential and you can find them here. There are even special schools to teach children.
The basics of skiing and aerobatics are taught at ESF Megève, the largest school. There's alpine and cross-country flat skiing, as well as snowboarding. They offer both morning and evening, as well as individual and group lessons.
Teaching alpine skiing costs about 150 EUR per day, based on 5 lessons. This is for groups. If you take individual skiing lessons, the price goes up to 350 EUR per day or more. Basic alpine skiing will cost a little less, as will simple lessons in flat skiing.