I'm kind of reluctantly bring up science. It's a touchy subject if you homeschool and are Christian. Most subjects are pretty straight forward, they are what they are. Some companies teach all their subjects through a Christian lens, such as BJU and ABeka, but math is still math and English is still English. The tricky part is science. I won't bore you with all the details right now (but if you want more I can send you links for more information) but the basic gist of the issues with science has to do with the age of the earth.
The two primary Christian sides are young earth creationism (YEC) and old earth creationism (OEC). Both believe that God created the earth, they just differ in when that happened and differ by millions of years. The problem with science curriculum is that most books written for homeschoolers tend to be written from the YEC point of view. This is a problem for us because this is not what we believe. I've had a hard time trying to find high school level science books that are written to the student (like most homeschool books for high school students) and are high quality but come from a OEC viewpoint. Frankly, I'm not sure it exists. About the best I could do is to order from somewhere like Prentice Hall and get the books they use in the public schools. Nothing wrong with that necessarily except that they cost a lot more and are not written for independent use.
In the end, I've had to compromise on what I want. I've gone with Apologia science for this year and am creating an Earth Science class (probably the worst thing to do with their YEC slant). It will give us plenty to talk about as we talk through what the text presents and what we believe. Should be an interesting year in science class.