S.R.
I used to purchase a variety of workbooks when my dd was that age. I didn't follow a specific curriculum, because the workbooks usually covered it all. I would buy different ones from different publishers because each covered things a little differently and that was good to cover a wide topic area. My dd went through hundreds of pages of material all before kindergarten and was doing second grade workbooks even in preschool. She loved the one on one time with me too. As far as Christian topics, there are workbooks that go through the Bible too!