Common Core State Standards
CCSS.Math.Content.K.MD Measurement and Data
CCSS.Math.Content.K.MD.A Describe and compare measurable attributes.
CCSS.Math.Content.K.MD.A.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.
CCSS.Math.Content.K.MD.B Classify objects and count the number of objects in each category.
CCSS.Math.Content.K.MD.B.3 Classify objects into given categories; count the numbers of objects in each category and sort the categories by count.