Exploring
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Haleemah and ET generalize Amir’s method that relates an unknown Size Number and the number of gray stones in the cobblestone pattern.
Episode Supports 
Students’ Conceptual Challenges
Focus Questions
For use in a classroom, pause the video and ask these questions:
1. [Pause video at x:xxx]. text
Supporting Dialogue
Focus students’ attention on conjecturing and providing evidence for their conjectures:
1. Example