Have you explored the U.S. History Primary Source timeline available on the Library of Congress Website? It is a massive collection of incredibly useful digital primary sources that you can share with your students. A great activity that you can have your students complete with these resources is to analyze the resources with the SOAPS process. I have created a Google Forms template that you can use for that activity.
All you have to do is find a primary source applicable to your current topic, then post that link and the SOAPS Google Form in a Google Classroom assignment. The resources are very high definition and full on fascinating!