The book of Deuteronomy emphasizes the importance of teaching our children about God and the blessings He has given us. He expects all of us to keep His commands so it’s important to pass them on to the next generation.
The historical purpose of the book of Deuteronomy is to review and renew the terms of God’s covenant with the children of Israel. Its doctrinal purpose is to show that obedience is necessary for blessing. And its redemptive purpose is to show that God would one day bring another prophet greater than Moses.