I forgot to mention!
Although I plan to keep things simple for a while, I might also be interested in teaching Spanish, geography, and Bible.
My son LOVES to learn, so I plan on adding in some unit studies as well as some fun science experiments (possibly from Magnets to Mudpies?) in there as well.
And (my goodness, this is getting crazy long), I've also thought about buying CDs from Classical Conversations to learn skip counting, etc.