Hello J.
You're putting a lot of pressure on yourself by choosing to switch to homeschooling in this rushed kind of way!
Would it be possible for you to switch him to another classroom for right now and take off the pressure? There are some WONDERFUL teachers out there.
If I remember correctly, the big homeschooling conventions are held in the spring so that people can buy the materials they need for the next year. You might want to attend one of these conferences. But you might also want to be researching material NOW!
Probably the best way to start homeschooling is to get to know some people who are already doing it and spend time with them and find out what they are using and what works for them. The request you put out today may help you get started on that.
If you have been wanting to homeschool for awhile, then you could just pull him out like you've mentioned and buy some "filler" material(Sam's Club, Mardels, the local homeschool store) while you research stuff and buy the materials you want. There are a lot of excellent materials out there. But, like I mentioned, that's putting a lot of pressure on you.
I didn't homeschool all the way through, but when I did have my kids at home, I preferred the history approach, starting with the beginning of time and proceeding to modern times. My sister used the "unschooling" approach for much of her kids education. The oldest went on to graduate with honors from college, the second oldest is now in college, and the youngest two could care less about attending more school.
If you want to correspond more than send me a note and I'll write back.
I wish for the best for you and your child as you figure out what you want to do. Life is an adventure!
A.