In response to Robert's question, about dads homeschooling and mom working here are some of my thoughts. (Which is really just a summary of comments by Susan, Jessica and Monika.)
1. God has provided the man to work for the family. 1 Timothy 5:8- "But if anyone does not provide for his own, and especially for those of his household, he has denied the faith, and is worse than an unbeliever." and Also see 2 Thessolonians 3:10. Paul talked against the men who were idle and did not earn they bread they ate. He said, "We hear that some among you are idle. They are not busy; they are busybodies. Such people we command and urge in the Lord Jesus Christ to settle down and earn the bread they eat. And as for you, brothers, never tire of doing what is right.
2. I have no problem with dads homeschooling. Scripture actually gives the husband the responsibility of teaching to the children in Deuteronomy 6. In a marraige, he is able to delegate some of that responsibility to the wife. However, that does not negate his ultimate responsibility and he will be held accountable for what is taught.
3. As to the issue of whether a wife should work and a husband stay at home and educate. I find that this would be a difficult scenario to support from a biblical basis. (That is not to say that there may be situations where a wife is asked to go to work. I wrote about that here.) The understanding is that the wife is the "keeper of the home" and a helper to her husband. It is difficult for a wife to do what is necessary to keep the home and also work for someone else in another situation. This puts the wife in a conflicting situaiton. Her priorities and best hours are spent away from the family. I don't believe a woman can be a "keeper at home" and at the same time be a "keeper of another's business". I wrote about my personal experience with this in a post called "Choosing Home."