When will the orthodontic treatment be done?

My parents did it when I was in high school, so I wonder if I should do it for my children too, even if it's late. They are currently middle school students; should I take them to the dentist to see if they need orthodontic treatment?

I want to do it a bit later because I tend to focus a lot on studying (though I didn't actually study, haha).

But these days, it seems like there's a trend to do things quickly.