I dunno, while this curricula of a Christian high school math department makes for some unintentionally surreal reading, I can't help but wonder. The secular schools have made a damned big mess of things, and if these kids actually learn from these courses, why not?

In my opinion, the truth is as long as you know the basics, have the discipline and motivation to apply yourself, and the tools needed to learn the hard stuff, the rest is just decoration. Meh, their kids, their money, their business.