The Common Core State Standards (CCSS) ask for students to show a deep understanding of mathematical concepts. In the past, teachers have taught step-by-step instructions on "how to round a number." Over the next few days in Room 202, we will be rounding on a vertical number line to show exactly why those steps for "how to round a number" work.
This video, Rounding on a Vertical Numberline, explains how to use the vertical number line when rounding. Stay tuned within the next few days for a video of students teaching this concept!
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