One of the most charming and easiest volumes I ever read as an undergrad was James Deetz, In Small Things Forgotten (1977). It was intended as something of a primer into the newly organized field of historical archaeology, but what it offers as a multi-disciplinary look Puritan life (your second unit) is extraordinarily insightful and accessible.

Deetz, who is a folklorist and archaeologist/student of material culture, shaped my perception of the past, and over the ensuing decades, it inspired me to write a Western, twenty-first-century response. Originally reading Deetz in 1977, I picked the volume up again in 2010 and found it just as inspiring (and blessedly brief and to the point!). I fashioned my response, which appeared in 2012: Virginia City: Secrets of a Western Past, which I hope is also blessedly brief and to the point! It would fit in as a look at the American West for units 5 and/or 6. I have posted the second chapter here.

Because these two books draw on material culture, they include stories that are often left out of historical narrative, offering insights into women, children, and ethnicities who are too often not the focus of the primary and traditional secondary sources.

I highly recommend Richter's Facing East from Indian Country: A Native History of Early America to help shift the narrative of contact. Too often we tell the story of North America looking west, giving only the briefest overview of Native America, before "the real" story starts with colonial arrival. Richter sets the story looking east, grounding the story of colonialism in Indian Country. It will provide a valuable mind shift to how you teach the narrative of U.S. history.

I also highly recommend Ostler's Surviving Genocide: Native Nations and the United States from the American Revolution to Bleeding Kansas to continue this narrative shift. Too often our national story strips indigenous nations of agency, portraying them as constantly reacting to colonists, instead of actively working for their own interests. We also tend to hide the less honorable portions of our history. Ostler challenges both trends, and shows how early U.S. Indian policy developed with a continual threat of extermination, and how Native nations negotiated a threatening political landscape to survive in a country that wanted them to disappear.

Highly recommend Why You Can't Teach United States History Without American Indians. It's explicitly designed for people teaching US history surveys such as yourself. Each chapter covers a different topic ranging across pretty much all the units you've listed here. The goal of the book is to reframe common topics in survey courses from the point of view of how they involved issues of Native American sovereignty, identity, and agency. So you'll have a chapter on the fur trade that argues we could easily call it the cloth trade instead, since textiles formed the bulk of trade goods to the extent that European textile industries competed for the Indian consumer market. Or looking at the rise of literacy with an eye to how that zeal for educational reform manifested in residential schools. There are also some great chapters exposing how maps in US history textbooks erase Native borders and political units.