Deuteronomy 7

 Deuteronomy 7:9: “Know therefore that the Lord thy God, he is God, the faithful God, which keepteh covenant and mercy with them that love him and keep his commandments to a thousand generations.” 

In His mercy, God allows the blessings of obedience to be operative for a thousand generations. - God is loving. He "set His love on you" (v. 7,8). - God keeps His promises. He "kept the oath which He swore" (v. 8). - God is faithful. "He is God, the faithful God" (v. 9). - God is merciful. He keeps "His lovingkindness to a thousandth generation" (v. 9).

Deuteronomy 6:6-7:
And these words, which I command thee this day, shall be in thine heart.  And thou shalt teach them diligently unto thy children, and shalt talk of them when thou sittest in thine house, and when thou walkest by the way, and when thou liest down, and when thou risest up. 

There must be heart reality, not mere external conformity or ceremony. The training of children should take place in real-life situations and settings. The goal of education is to prepare the child to glorify God in real life, so the setting for education ought to be real life. Most modern education departs from the Biblical model in that it seeks to teach children in the artificial environment of a school surrounded by the peers.
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