Proverbs 22:6 (Amp)
Train up a child in the way he should go [and in keeping with his individual gift or bent], and when he is old he will not depart from it.

Each child is an individual, with his own giftings and bents hard-wired into him from the Lord. Keep your heart tuned to looking for them. Ask God to open your eyes. As in — is he a reason-oriented or feelings-oriented child? When you know that, it will help to train him in a way he hears. Does he learn by reading or by doing? Does he like to figure out for himself or be shown? I see a picture of walking beside him instead of pushing against him, not in the “whether” of training, but in the manner of training. And, because it was done in accordance with his bent, it will stick with him.