Teach them what?

In addition to Proverbs 22:6, the other verse in the Bible that is near and dear to my heart as a mother is:

Deuteronomy 6:5-7 You shall love the LORD your God with all your heart, with all your soul, and with all your strength. And these words which I command you today shall be in your heart. You shall teach them diligently to your children, and shall talk of them when you sit in your house, when you walk by the way, when you lie down, and when you rise up.

What are we commanded to teach? The Word of God.
Now, don't misunderstand me. Math, Reading, Science...all that is important and we should be teaching our children these things.
But, first and foremost, we need to teach them the Bible. And, like everything else, we cannot teach what we do not know. I encourage you to put priority on God's Word. Read it. Memorize it. Quote it. Stand upon it. And...teach it to your children.