Notgrass History is a traditional text book history curriculum. The text books are visually stunning and laid out very well. It's been a few years since we have used this curriculum but we enjoyed the time we used it. They have excellent literature books that run along side the time period you are learning about. We used Notgrass History for middle school years. They have since added in elementary curriculum too. I have no experience with this so therefore I can't give any experience.
My children liked this curriculum and a wild collection of state quarters started during one of our years using their curriculum. The crediting they lay out for high school is very simple to follow too (something we moms of high school students appreciate!)
I've also heard Ray Notgrass speak at several conferences and was very blessed by his heart for the Lord, his heart to have children learn factual history, and his personal love of history.
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