Raising Real Men is a great resource. Their book is fantastic. They have raised boys ((and 2 daughters) and their Biblical insight is so encouraging and helpful.
For my son he really likes books and movies, so naturally finding stories with strong Biblical male characters has been a good way to reach him. There is a series by Chuck Black, Kingdom Series, that my son loves, the knights and all that really gets him thinking. Ralph Moody has a fantastic series about his life growing up, starting with Little Britches, as a rancher. His dad passed away when he was 12 (I think it was) so it really addresses boys stepping up into responsible roll and helping the family. It has some “rough/cowboy” language but for us we not too much, just here and there not entire book, maybe read first if you are concerned.
Behind the Mask is a Christian produced movie with action and adventure with a Biblical message at the heart.
What ever interests your son (athletics, games, books, history, sciemce…) if you can find people or events that protray that in a Biblical manor it is a good place to start. For us it has been one of the best ways to reach my son. Hearing it from someone else helps him. I avoid current athleats for example, we have had better luck going back so you can see their entire life, the ups and downs, not to get discouraged by current people’s actions, how they might let him down.
Hope that helps 🙂