## Reflection: Developing a Conceptual Understanding Domino Addition: Understanding the Part/Part/Whole Relationship - Section 1: Activator and Materials

During this lesson's activator I assumed that my students were very comfortable with the concept of "part/part/whole."  It became evident that the students needed more practice with the model.  I spent some time reviewing this concept using manipulatives and then using whiteboard practice.  It seemed that this extra practice helped my students to better understand the idea.

Understanding and using the part/part/whole is important for the development of foundational mathematical thinking and helps students to develop flexibility in composing and decomposing numbers. The use of concrete objects helps students to make sense of numbers. Once the pupils can visualize the part-whole relationships, they move to more abstract models such as the open number line.

Developing a Conceptual Understanding: Domino Addition Reflection

# Domino Addition: Understanding the Part/Part/Whole Relationship

Unit 1: Addition and Subtraction Basic Training
Lesson 2 of 7

## Big Idea: The big idea of this lesson is the understanding that addition can be represented as parts of a whole and that we can use addition sentences to represent those parts.

Print Lesson
19 teachers like this lesson
Standards:
Subject(s):
60 minutes

### Kristen O'Connor

##### Similar Lessons

###### Cover Up
1st Grade Math » Counting by Groups
Big Idea: Yesterday we added it up and today we cover it up. Students will work in pairs as they cover random numbers on a number grid and ask their partner to figure out which numbers are Covered Up!
Favorites(5)
Resources(17)
Waitsfield, VT
Environment: Suburban

###### It's As Basic As That
3rd Grade Math » Understanding Multiplication
Big Idea: Students need to master the basic operations. The common core suggests that all four operations are mastered by the end of third grade. This lesson will help determine where to start and what to do next.
Favorites(13)
Resources(11)
Troy, MI
Environment: Suburban