Lesson plan

# Exemplar: Count and Compare

teaches Common Core State Standards K.CC.C.6 http://corestandards.org/Math/Content/K/CC/C/6
teaches Common Core State Standards K.CC.C.7 http://corestandards.org/Math/Content/K/CC/C/7
teaches Common Core State Standards MP2 http://corestandards.org/Math/Practice/MP2

# Exemplar: Count and Compare

Lesson objective:

Compare two sets using words like "is greater than", "is equal to", and "is less than".

In this Guided Collaborative Task, students will use their knowledge and understanding of one-to-one correspondence and counting a set of objects regardless of their arrangement or order to compare amounts.  Students will count objects, use a comparison mat and drag the appropriate phrase ("is greater than", "is equal to", and "is less than") to make a true sentence.

Under the “Additional materials” tab, you’ll find a comparison mat that may be used as students manipulate counters to compare values.

Prior knowledge needed:

Students bring prior knowledge of naming a set using the last number name said and the number of objects is the same regardless of their arrangement or the order in which they were counted (K.CC.B.4.B). This prior knowledge is extended to comparing sets as students count and compare sets of counters.

How students will collaborate:

Collaboration happens through the turn and talk collaborative structure.

Mathematical practice featured:

Students engage in Mathematical Practice  2 (reason abstractly and quantitatively) as they count and compare written numerals that represent the sets they grab.

Key vocabulary:

- compare
- count
- equal to
- greater than
- less than
- set
- value

Special materials needed:

- counters
- work mat