The curriculum I'm using can be purchased at Teachers Pay Teachers as either single units, which I am using, or as a complete bundle which would take you through an entire year (for Christian Schools or Sunday Schools).
The interactive notebook is great! At the end of our semester we have a presentation night where the teachers set up a table to show off what they class has done. My class is creating their interactive notebook to have on display. It's such an easy thing to do for great review. I love that the creators of this curriculum supplied both a black and white version that the kids can color AND a full color option. I use the full color set - if I had the kids color the whole thing I think we would still be on unit 1!!