I am trying to sight in my son's new bow. I'm having a hard time because I think he is moving too much. Its not like a gun that you sight in from a vise on a table. Whats the best way to teach him to be more steady?

Seek the help of an experienced shooter. Shooting a bow accurately is all about consistency. He must anchor the same way every time. This is where having an experienced shooter working with him will come into play. They will be able to help him come up with anchor points that he will be able to repeat each time easily. Plus there's a lot of basic stuff to do with form and stance that has to be taught in person.

Thanks. He is in a 4H archery club that goes to state and national competitions each year, so the instructors will help some, but I don't want them to think we aren't doing our part at home. I'm just not sure how much inaccuracy is due to his shooting or due to the bow itself. If it was a gun, I could set it up for him and rule out the equipment.

I do think I will call on another friend of mine who is very experienced. I am about to get a bow for myself and I will need to learn all of this as well.

X2 with what Shaw said, also he doesn't need to try and aim more than float the pin if that makes sense.. If I try and force my pin on a point in my target I feel like I move more. Floating allows me to become more relaxed.