Reflection: Developing a Conceptual Understanding Review: Rounding Whole Numbers - Section 2: Independent Practice


Number lines can help student gain a conceptual understanding of the skill.  Many many years ago, when I was a student, I learned to round numbers by using the rules: if the number behind the underlined digit is 5 or more, round up by 1, or if the number behind the underlined digit is 4 or less, the underlined digit stays the same.  I still teach my students those rules, but I use tools, such as number lines, to the give them that conceptual understanding.  There is an old saying, "I can show you better than I can tell you."  The number line shows the students.

  Number lines
  Developing a Conceptual Understanding: Number lines
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Review: Rounding Whole Numbers

Unit 2: Skills Review
Lesson 5 of 11

Objective: SWBAT round whole numbers by placing the number on a number line.

Big Idea: A number line can be used to help round whole numbers.

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  40 minutes
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