## Reflection: Developing a Conceptual Understanding 10, 20, 100 Day 2 - Section 3: Station Adaptation

It is logical to make the developmental jump from 100s to 100s when adapting this game.  However, just like you develop the "five-ness" in kindergarten and then move onto tens in 1st grade, you will want to make sure that students understand the connection between 500 and 1000.

This is often a forgotten or easily overlooked concept and a very important milestone on developing number sense.  The idea being that students connect this to their knowledge that they have been building since kindergarten.  Students worked within 5 in K, within 10 and 20 in 1st, within 100 and 1000 in 2nd.  You want to make sure that students make these connections and work with students that are struggling with this idea.

Don't Forget 500!
Developing a Conceptual Understanding: Don't Forget 500!

# 10, 20, 100 Day 2

Unit 15: Complements of 10 and 20
Lesson 3 of 5

## Objective: SWBAT identify the complements for the numbers 10, 20, and or 100.

### Thomas Young

203 Lessons14 new

## Big Idea: Students will use dice to roll a number and then find the complement to make 10, 20 or 100.

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Standards:
Subject(s):
Math, Number Sense and Operations, 1st Grade, complements of 10, 20 or 100
65 minutes

### Thomas Young

203 Lessons | 14 new

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