This video shows primary students using a Science Talk protocol as way to collectively theorize, build on each others' ideas, work out thoughts, build literacy, and think, wonder, and talk about how things work. First, the teacher revisits the guiding question ("How does a spider's body help it survive?") and has students review information. She then reviews the Science Talk norms and has a small group of students model. She reviews sentence frames (e.g., "I agree with... because...") that will help students speak like scientists. Students then participate in Science Talks in small groups; the teacher circulates to listen, probe, and coach. We see students building on each others' ideas in a format that promotes equitable conversation. Finally, students reflect on their learning, revisiting the guiding question and the big idea (every part of a spider has an important function that helps it survive).