What do you notice? What do you wonder?
Spark Image
Estimation: Prompt Video
Estimation: Prompt Image
Estimation: Reveal Video
Estimation: Reveal Image
Struggle Prompt: Video
Struggle Prompt: Image
Reveal: Video
Reveal: Image #1
Reveal: Image #2
Consolidation Prompt #1
How is subtracting 10 or 20 from a number easier than subtracting 9 or 19?
Consolidation Prompt #2
45 – 19
Show your thinking on a numberline.
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