## Reflection: Staircase of Complexity 10 More and 10 Less - Section 2: Develop the Concept

I begin this lesson talking simply about how the students can use the model of a hundred chart to understand the patterns in counting, in this case counting on by tens.  However, the goal of the lesson is to move from using the model, to thinking about how the digits change as the number gets greater by tens or less by tens.  The biggest idea of this lesson is to have the students understand that there is specific language of math.  My students typically do very well when I ask them what ten more than a specific number is.  However, when I change the language some students have a difficult time understanding.

The Language of Math
Staircase of Complexity: The Language of Math

# 10 More and 10 Less

Unit 4: Each Number Has a Place
Lesson 4 of 6

## Big Idea: The big idea of this lesson is for students to understand that our number system allows for identifying 10 more and 10 less than a number by simply adjusting the digit in the tens place.

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60 minutes

### Kristen O'Connor

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