Use the library's Films on Demand database to find short films covering issues related to your career too.
Google Images is a great tool to see the work of many photographers. For your presentations, however, the images may not be high enough resolution to project well. It's possible to find useful images with introductory information, and you can even use the advanced settings to limit to works that are in the public domain
Use the link below to find relevant supplemental resources on your topic