If you decide to homeschool your kids, they should learn the official stuff probably from the books used by public schools, but they should learn their REAL economics starting in what would be like 6th grade with Peter Schiff's book, "How an Economy Grows and Why It Crashes," then moving on to Henry Hazlitt's "Economics in One Lesson," for a full understanding of the basics, then moving on to things, if they really care, like Ron Paul's "End the Fed," the History of Economic Thought books by Murray Rothbard, and maybe even Ludwig von Mises's "The theory of Money and Credit," which I only recommend (and I haven't even finished it yet), to someone who is really interested in it and has a LOT of free time. Get the rest of your econ material from Tom Woods and mises.org
Also, have them read the "Politically Incorrect Guide to History," by Tom Woods at what would be like 8th grade. Then, a book I'm going to start reading at some point, and what I heard is really good and in-depth for US Colonial History, is Murray Rothbard's "Conceived in Liberty," which is around 1600 pages long.
I am NOT a teacher (although people have told me a should have been... I do tend to over-explain stuff sometimes.), but these books were interesting and informative for me.
I never learned Latin, but I look it up, and apparently the easiest way to learn Latin is with a book called "LINGVA LATINA", which I started reading, but then got to busy with other stuff to continue reading. You have to schedule out time every day to learn if you want to, and I don't really make schedules for myself, so, that never really took off, but I have learned a little bit of Latin, not enough for a conversation yet, but the book seems to be good, as it teaches through Immersion (all the sentences are Latin, you have to figure out what they mean while you read it based off the pictures and the context in the sentences).
Math and Physics would be easier for me because they're actually related to my major, but I'ld look for textbooks used in a public school's AP (Advanced Placement) math and science classes, and base your material off of that.