This site includes a video to clarify copyright issues as well as sites to explore to find photos. My favorite is https://pixabay.com but I plan to check out the others curated here!
At this site you'll find data sets to analyze in math class! Most sets have questions to consider, activities, Desmos links, and more.
Just 5 minutes! Inspiration, Ideas, Instructional! At this site you'll find links to the NCTM Ignite sessions ... short videos to use for professional learning and encouragement!
A digital curation project is a fast way to engage critical thinking in any content area. This blog explains how it works and tools to use. I can see students creating test or exam reviews by curating the best videos, photos, and websites to explain various concepts!
Check out this site for engaging mathematics with an emphasis on hands-on materials and critical thinking. I found several variations on card sorts here!
These books are not just books that math teachers like or read ... they are books WRITTEN by people who participate in MTBoS!