"Teach" - shânan: to sharpen (prick) diligently or rub them in by repetition. (Hebrew)
In Deuteronomy 6:1-11, God tells His People Israel there are conditions of receiving His blessing upon entering the Promise Land. They must hear God’s Words, fear Him , keep His statutes, commands and judgments.
1 Now these are the commandments, the statutes, and the judgments, which the LORD your God commanded to teach you, that ye might do them in the land whither ye go to possess it: 2 That thou mightest fear the LORD thy God, to keep all his statutes and his commandments, which I command thee, thou, and thy son, and thy son's son, all the days of thy life; and that thy days may be prolonged. 3 Hear therefore, O Israel, and observe to do it; that it may be well with thee, and that ye may increase mightily, as the LORD God of thy fathers hath promised thee, in the land that floweth with milk and honey.
4 Hear, O Israel: The LORD our God is one LORD: 5 And thou shalt love the LORD thy God with all thine heart, and with all thy soul, and with all thy might. 6 And these words, which I command thee this day, shall be in thine heart: 7 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. 8 And thou shalt bind them for a sign upon thine hand, and they shall be as frontlets between thine eyes. 9 And thou shalt write them upon the posts of thy house, and on thy gates.
10 And it shall be, when the LORD thy God shall have brought thee into the land which he sware unto thy fathers, to Abraham, to Isaac, and to Jacob, to give thee great and goodly cities, which thou buildedst not, 11 And houses full of all good things, which thou filledst not, and wells digged, which thou diggedst not, vineyards and olive trees, which thou plantedst not; when thou shalt have eaten and be full;
They are to TEACH (shânan) then diligently to their children. As a mother, I am called to TEACH our children how to love God with all their heart, soul and might. How do we do that? We do that by sharpening them diligently with repetition of the Ways of God. Teach them His Commandments and His Instructions in how He desires of us (His People) to live by... in the Word.