Joel Beeke explains in this video that it can be difficult for fathers to practically teach their family and apply Scripture to everyday life. It is important for fathers to bring Scripture to bear on every part of life. We want fathers to be teaching their children every day. By the time children leave the home, it should be a father's goal that there has been no significant area of life that they haven't talked about with their Dad in detail about what Scripture has to say.
Proverbs 22:6 (NKJV) - "Train up a child in the way he should go, and when he is old he will not depart from it."