Both Cal and Abbott's schools use the second step curriculum. Here is an example of one way it is used in Cal's preschool classroom. Every day, the children are given a question to answer. This picture is from second step; the question is "how do you think Enrique is feeling?" This is great practice for this group of four year olds in many ways, including emotional awareness and writing.
Here are Julio and Jorge, the classroom pets who are asking the questions. These are axolotls that were donated to the classroom by a parent who works in a research lab. (I think they're creepy and try not to look at them; the kids don't really seem to notice them one way or another.)