Teens as adults

[justleftofbrilliance]

How many days does it have to be when your teens will be the same as adults? Meaning like don't have to goto school anymore. I noticed in 7 days teens can move in with another person but if you want them to not goto school then how many days does it have to be? I tried looking this up but can't find it it only says when they are 18 they don't have to goto school for the InTeenimater.