Images are an indispensable part of your online course. Here, I share my favorite websites for Creative Commons (CC) images.
Pexels (which also searches these websites: Pixabay, Unsplash, and Gratisography)
You can also use Google advanced image search.
And remember, “avoid using distracting images for decoration”! (Marjorie Vai & Kristen Sosulski, p. 73)
If you are not familiar with Creative Commons licences, click here (“Shared Creations: Making Use of Creative Commons” by by Emily Puckett and Kristin Fontichiaro, 2013).