Teach my children by my deeds and mouth

Psalm 78:1-8
Hear my teaching; listen to the words of my mouth. I will utter hidden things, things from of old.
He decreed statutes for Jacob, and established the law in Israel.
The next generation would know them and they in turn would tell their children.
Then they would put their trust in God and would not forget his deeds but would keep his commands.
Why?
God gave Israel the law to remind them of him.
In turn tell their children, not only to be a custom but to be a faith in life; trust in God.
The law is established by the Lord in order to teach us, let us listen his words everyday.
How?
My trust in God, in turn I need to teach my children, teach them by my deeds and my mouth. Even I have not listened God's words from my parent.