Emily and Mauricio reflect on another student’s equation: (7 + x) • (3 + x) = 7 • 3 + 7 • x + 3• x + x2. They discuss how this equation is similar to and different from the equations they wrote in Episode 7. They also reflect on the meaning of equivalence in the garden context.
Episode Supports
Focus Questions
For use in a classroom, pause the video and ask this question:
[Pause the video at 6:34] Before watching Emily and Mauricio connect expressions to the drawing, do this for yourself. Link each number and operation in the equation (7 + x) • (3 + x) = (7 • 3) + (7 • x) + (x • 3) + x2 to the drawing. For example, where in the drawing do you see 7 + x?
Supporting Dialogue
[Pause the video at 4:12] Tell a partner how you would check to see if the equation is true. Then compare your ideas with how Mauricio and Emily check the equation.
