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.

  Domino Addition Reflection
  Developing a Conceptual Understanding: Domino Addition Reflection
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Domino Addition: Understanding the Part/Part/Whole Relationship

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

Objective: Students will be able to correctly identify the parts and the whole for an addition number sentence, using a part/part/whole model.

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.

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