This book has 75 lessons beginning with America's expansion into the lands west of the Mississippi River and continuing to modern times. It also includes an index to the curriculum.
This is a fantastic resource for middle school history! I love how it covers so much more than just events, highlighting people, places, ways of living, and the like. As a teacher, I found that it worked great as a launching pad; I was consistently creating a bigger picture for my students with outside resources. But I would still recommend this book and the one before it to teach American history.