When to send ACT score, Help!!!

<p>My son just took the ACT for the 2nd time ,as a junior. He took it as a sophomore last year. He did not send his results to any schools the first time.I thought we should only send after he gets the score he wants on it. Some people say go ahead send when he takes because then its free to send to 4 schools. But we don't even know if he'll do as well on this one as he did last time. And they only send the score you request not the best. So help me out. Send only when he gets the best score he can, or keep sending all scores? Appreciate it. Confused Mom.</p>