Sourcera for Google Slides - Historical Images to Use In Your Slides | Free Technology for Teachers | Distance Learning, mLearning, Digital Education, Technology | Scoop.it
Sourcera is an Add-on for Google Slides that lets you search for historical images and insert them directly into your slides. Sourcera pulls images from eleven sources including Flickr's Commons, the British Library, and the Digital Public Library of America.

Via Elizabeth E Charles