All the digital collections on this page are freely accessible and the documents are in the public domain. Therefore you can upload screenshots or the documents themselves to the class site.
It is still important to provide proper citation information. First, check and see if the collection in question has a page that tells you how it would like to be acknowledged. For instance, here is the citation page for Chronicling America. If you can't find something similar for a collection, at a minimum provide the collection's name with a link in the citation.
Below are some collections that you can search to find articles related to historical events. Because these are all freely accessible, you may link to or upload downloaded documents to the class project.
Some states have worked only with Library of Congress' Chonicling America, but others have created their own repositories of digitized newspaers.
Note: The search interfaces for these may vary a lot.
These are a couple of examples of very large digital repositories. Many different institutions have contributed to them and they have a wide range of content types. Searching in here will be even more hit or miss than searching in the newspaper collections, but occasionally you might find something really interesting! I've included a few examples of things I found.
