This little anecdote by John Piper is a powerful reminder to make God supreme in all your child's learning no matter if you homeschool or send your kids to a Christian school or public school.
I remember the day when my non-academic, dyslexic son said to me, "Why should I care about spelling the way everybody else spells?" I countered, "Well, you won't be able to communicate as well if you don't learn how to spell the way everybody else spells." "I don't care about communicating well,” he replied. “Why should I care about communicating well?"
The blasphemous, standard, 20th century answer to this question is, "If you don't learn how to spell and communicate, you won't succeed in business and make as much money. And above all, you won't have a high self-esteem." What a Godless answer.
Here's another answer; the one I gave my son. "Ben, you should care about communicating and learning how to spell because you were created in the image of God. And God's a great communicator. You should want to communicate because you’ve got something infinitely important to communicate. You’ve got God to communicate. You’ve got salvation to communicate. You’ve got Jesus to communicate. You can't be indifferent, Ben, to communication. God is love, and we scorn his love when we are indifferent about communicating good news to our neighbors, when they desperately need to hear these things. You need to care about communicating because language was God's idea from the beginning. `In the beginning was the Word. The Word was with God.' It was God's idea. He is not a God of chaos and confusion. He's a God of beauty and order. He's not a God of anarchy, even spelling anarchy.”