This site is interesting. I could fritter away lots of time playing here. I can see that it could be a useful tool for sharing images with a class. It does not seem as useful for efficiently finding photos to use for lessons.
I am the health occupations (HOSA) teacher, so, I tried to find an image to share that was connected to my curriculum. Searching for "anatomy" tags brought up some interesting images. Nothing pornographic, but many were not appropriate for sharing on a blog or with a high school class.
I got a late start on the 23 things because I was in China. It was a wonderful trip, but the weather was overcast and rainy. I wanted to see the great wall. I went to the great wall. Instead of sharing my picture of the cloud that covered the great wall, I will share this picture of what I would have seen in better weather.