My son's kindergarten teacher uses a "green, yellow, red" behavior system.
Today was the third day this week that he got moved to yellow, and another note came home.
The offense this time? Putting ants on his friends at recess (!!)
When asked to explain himself, his response was "I have been trying really hard to be good at home, daddy, and I just don't have enough goodness in me for both places. So you need to pick just one!"