Here are five endless sources of interesting images, animations, facts, and ideas that you can follow for free!
The Kid Should See This: By far my favorite source for classroom friendly, fascinating movies. Rion, the creator, goes the extra mile to write up explanations and link to related movies.
Silent Movie Gifs: This is a Twitter account that shares brief animations from silent films. So many great clips to show students. My favorite so far is a Chaplin clip showing how they pulled off an amazing special effect.
Numberphile is a YouTube channel in which journalist Brady Haran interviews professors about fascinating math topics. The experts are a pretty entertaining bunch.
Paperboyo is an Instagram account featuring cutout paper overlaid on popular landmarks to create new images. Love how low-fi and creative this is. Totally something your students could try.