Curriculum Library

Counting & Cardinality Unit 2: Count to Tell the Number of Objects

Key Concept: Objects contain attributes which can be sorted.

Lesson Sequences

This topic is still in development.

Key Concept: The last number counted indicates the number of objects in a group.

Lesson Sequences

This topic is still in development.

Key Concept: Changing the arrangement of a group of objects does not change the quantity.

Lesson Sequences

C.2-3-4 Create Groups to 20  |
Lesson Plan
View Lesson Opener Hands-On (5-10 min)
View Guided Lesson Students apply their understanding of counting a group of objects to create a group that contains up to 20 objects. (12-20 min)
View Lesson Closer Math Musings (5-8 min)
Key Concept: Grouping is a strategy for counting a large collection of objects.

Lesson Sequences

C.2-4-2 Counting Collections to 75  |
Lesson Plan
View Teacher-Facilitated Lesson Students apply their understandings of counting and cardinality in order to count a collection that contains up to 75 items.  (35-45 min)