At P.S. 249, the Caton School, in Brooklyn, New York, kindergarten teacher Julie Jay starts nearly every lesson by stating exactly what she wants her students to learn. She closes by circling back and having the kids share what they just learned—and how they know they’ve got it. This brings clarity to her classroom, she says, and makes it clear how every part of the lesson relates back to her objectives. On top of that, the built-in reflection helps the learning stick.