# Comparing Sizes & Counting Collections

Pre-K / Math / Reasoning
CCSS: Math.K.MD.A.2 Math.K.CC.B.4

Common Core State Standards

 Math Math K Kindergarten MD Measurement & Data A Describe and compare measurable attributes 2 Directly compare two objects with a measurable attribute in common, to see which object has "more of"/"less of" the attribute, and describe the difference. For example, directly compare the heights of two children and describe one child as taller/shorter. Download Common Core State Standards (PDF 1.2 MB)

Common Core State Standards

 Math Math K Kindergarten CC Counting & Cardinality B Count to tell the number of objects 4 Understand the relationship between numbers and quantities; connect counting to cardinality. a. When counting objects, say the number names in the standard order, pairing each object with one and only one number name and each number name with one and only one object. b. Understand that the last number name said tells the number of objects counted. The number of objects is the same regardless of their arrangement or the order in which they were counted. c. Understand that each successive number name refers to a quantity that is one larger. Download Common Core State Standards (PDF 1.2 MB)

Developed in Partnership with

### Objective

Compare different sizes and groups of objects

9 min

### Questions to Consider

• What are the benefits of having students use their own bodies when reasoning about size?
• How does counting collections help students develop one-to-one correspondence?
• How does Ms. Salmeron infuse math into students' free play time?
Common Core Standards
Math.K.MD.A.2, Math.K.CC.B.4