These are a few of my favorite sciences.

What's your favorite thing about the natural world? There are lots of things to choose from. The profound tension between natural selection and biological diversity. The fact that no matter how fast you're going, you'll never catch up with a beam of light. The way snowflakes form.

How to read graphs: The public policy version

I follow The New Teacher Project on ye olde Facebooks, and lately they've been on a rant/rave/something about what they call irreplaceable teachers. This morning, TNTP posted this statement and the following graph: