Ch. 1. Laying the groundwork : setting goals and selecting tasks -- Ch. 2. Introducing the five practices model : contrasting the practices of two teachers -- Ch. 3. Getting started : anticipating and monitoring students' work -- Ch. 4. Making decisions about the discussion : selecting, sequencing, and connecting -- Ch. 5. Encouraging and guiding student thinking -- Ch. 6. Positioning five practices discussion within instructional design -- Ch. 7. Beginning secondary science teachers use the model : lessons learned.