A word of caution: While the CRAAP test has been in use by teachers and libraries for at least a decade, new pedagogies like Lateral Reading are being developed that better address the current information landscape.
For an introduction to Lateral Reading see this video from the Stanford History Education Group: https://youtu.be/SHNprb2hgzU
A primary source provides direct or firsthand evidence about an event, object, person, or work of art. Primary sources include historical and legal documents, eyewitness accounts, results of experiments, statistical data, pieces of creative writing, audio and video recordings, speeches, and art objects. Interviews, surveys, fieldwork, empirical studies—research where an experiment was performed or a direct observation was made. The results of empirical studies are typically found in scholarly articles or papers delivered at conferences.