I think everybody should start out on a 100-125 c.c. dirt bike and not be allowed on the street til they've broken off every extruding part on the bike. All my kids and grandkids(that are in my life) start out in the dirt and most bikers/not mid life crisis'rs that traded their golf clubs on a harley/have a significant advantage because of the experience. My buddy put his wife thru a riders training coarse and spent dozens of weekends tipping cones back up in vacant parking lots preparing her for her license, but, stuff happens fast on a bike and fear paralyzes, causes panic, etc. So put them in the dirt where cars won't run them over while they learn their limits.