Four-year-olds are expected to be able to behave in the classroom, but more and more preschools are kicking children out for bad behavior. In this episode: new research into how to best help children control themselves in the classroom.

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Music: Theme music by David Schulman. "Rate Sheet," "Lina My Queen," "Tiny Putty," "Rose Ornamental," by Blue Dot Sessions. Music licensed under Creative Commons attribution.