In this passage, Moses outlines the priority of parenting: teach your children about God. He begins with the shama in v.4, "Hear O Israel, The Lord our God, the Lord is one." Here is the first truth we must teach our children. God is THE God and there is no other.
The next truth is found in v. 5. "Love the Lord your God with all your heart, soul, mind, and strength." We must also teach our children what it means to be wholeheartedly devoted to him. The method of instruction is given to us in these verses.

First, we are to teach ourselves. "These commandments that I give you today are to be upon your hearts." v. 6. We must model the truths of the shama first and foremost. We can expect our children to grasp what it means to put God first if we are doing it in our own lives. The clearest and loudest words our children ever hear, are those of our own example.
-Children who live with critical parents learn to be critical.
-Children whose parents scream and argue learn to do the same.
-Children whose parents find all kinds of excuses to miss Bible class and church will find it easy to do the same.
-Children whose parents are not involved in ministry and concerned for others, will likewise be indifferent to the needs around them.

Next we are told to look for "teachable moments" along life's path to teach our children. "Impress them on your children. Talk about them when you sit at home and when you walk along the road, when you lie down and when you get up." v.7 This verse emphasizes the importance of informal training. One of the best ways to teach kids is to relate God and the bible to life. As situations arise in everyday living, use them as a platform to discuss spiritual truth with your kids. This is the most natural and easily accepted form of truth telling.

Deuteronomy 6:4-8