Though it cost all you have, get understanding. It is a financial burden on many parents and a less than lucrative profession for the teacher. Yet, the goal is Godly wisdom. Providing it for one's child is an opportunity and a privilege beyond monetary considerations. Though it requires us to give all that we have to secure it for a child, it is more important than anything else we can provide for them.
Eternity is at stake, on the one hand, and a spiritually successful life on the other.
Children are not to be deliberately place in situations where they become callused, hardened and overly exposed to the thoughts and practices of the sinful world. Secular schooling in the latter 20th century, if anything, is just such a breeding ground of evil. Christian parents are to avoid it for their children like the plague. A child, sensitive to God's ways and thoughts, can easily become exasperated in schooling situations where the faith of his parents, the claims of his heavenly Father, and the ideas of his church and home are either ridiculed or ignored. For where the word of God is not central, that institution is doomed to failure.