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Counting to Compare Sets | Identifying Quantities

Engage students in comparing quantities by identifying which set has fewer objects using counting skills. Reinforce concept of sets having less with various examples for practice and understanding.

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Counting to Compare Sets | Identifying Quantities

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  1. Learning Objective Name _________________________ Today, we will identify1 which set has less. 1 look for CFU What are we going to do today? What does identify mean? Identify means to _____________________. Activate (or provide) Prior Knowledge How many hearts do we have? 4 How many stars do we have? 2 CFU Students, you already know how to count to tell how many objects you see. We have 4 hearts and 2 stars. Today, we will use counting to identify which set has less.

  2. Concept Development Aset is a group of things that are together. A set hasless if it has the fewest things. Less CFU Count each set of objects below. Which set below has less? How do you know? 3 6 What is a set? A set is ____________________.

  3. Skill Development/Guided Practice A set has less if it has the fewest things. Identify which set has less. 1. 2. Circles Circles Triangles Triangles CFU (#1) How did I/you count each set? (#1a) How did I/you write the number for each set? (#2) How did I know which set had less? 2 3 2 3 Circles 3. 4. Circles Triangles Triangles 2 4 3 4

  4. Skill Development/Guided Practice (continued) A set has less if it has the fewest things. Identify which set has less. Oranges 5. Oranges Bananas 6. Apples CFU (#1) How did I/you count each set? (#1a) How did I/you write the number for each set? (#2) How did I know which set had less? 2 3 3 4 7. 8. Triangles Crayons Hearts Books 2 4 5 4

  5. Relevance A set hasless if it has the fewest things. 1. Identifying which set has less will help you make good choices. CFU Does anyone else have another reason why it is relevant to identify which set of objects has less? (pair-share) Why is it relevant to identify which set of objects has less? You may give me one of my reasons or one of your own. Which reason is more relevant to you? Why?

  6. A set has less if it has the fewest things. Skill Closure Identify which set has less. 1. Squares 2. Apples Oranges Stars 3 2 2 4 Constructed Response Closure James thinks that the group of carrots below has less than the group of bananas. Is he correct? How do you know? Summary Closure What did you learn today about identifying which set of objects has less? (pair-share)

  7. Name _____________________ Independent Practice A set has less if it has the fewest things. Identify which set has less. Juice Boxes 1. Milk Cartons 2. Hearts Squares 2 2 4 3 Carrots 3. Flags 4. Corn Books 5 6 5 2

  8. Name ___________________ Periodic Review 1 A set has less if it has the fewest things. Identify which set has less. Squares Circles 1. Strawberries Bananas 2. 4 6 4 6 Stars Juice Boxes Milk Cartons Circles 3. 4. 4 5 6 8

  9. Name _____________________ Periodic Review 2 A set has less if it has the fewest things. Identify which set has less. Scissors 1. 2. Pencils Oranges Apples 5 8 6 7 Triangle Pennies 3. Stars 4. Hearts 6 8 7 6

  10. Periodic Review 3 Name _____________________ A set has less if it has the fewest things. Identify which set has less. Hearts Pennies Carrots 1. 2. Corn 5 8 9 6 3. Flags Pencils Strawberries Apples 4. 8 6 10 7

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