## Reflection: Checks for Understanding More than 1,000 - Section 2: Looking for Patterns

I wanted to assess student understanding of numbers above 999 today. I know that students often say numbers in the thousands, but we have never gone beyond that in a lesson. I especially wanted to introduce the repeating pattern of Ones, Tens, Hundreds. I used color coding and the letters O,T, H and then O,T,H with a th subscript to show the repetition.

For many students it was an AH HA moment today when they saw the repeating pattern. They kept raising their hands and telling me how they saw the Ones in both, or the tens in both, or how there were hundreds in two places.

I asked at this point if they thought it might continue? They were curious but not all sure. I wrote O, T, H with a million subscript. I read a number 256,874,139 aloud to them showing how I read each part by itself (two hundred fifty six) and then at the comma said million, eight hundred seventy four and then pointed to the comma and said thousand, one hundred thirty nine (and here I said we could say ones, but we assume it instead).

The students wanted to try to read larger numbers themselves. They also wanted to go further. "Would it work in the trillions? the billions?"

They had discovered the structure of how we name numbers wanted to see if they could generalize it to larger place values (MP7). It was the act of discovery, the AH HA moment, that made the learning valuable today.

Ah Ha Moment
Checks for Understanding: Ah Ha Moment

# More than 1,000

Unit 7: Place Value
Lesson 2 of 5

## Big Idea: In preparation for third grade students are introduced to numbers above 1,000 and how the place values repeat the patterns found in numbers in the hundreds.

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50 minutes

### Beth McKenna

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