U.S. National Standards
AL.MD. Measurement and Data
Describe and compare measurable attributes.
MD.15. Directly compare two objects, with a measurable attribute in common, to see which object has “more of” or “less of” the attribute, and describe the difference. [K-MD2]
Classify objects and count the number of objects in each category.
MD.16. Classify objects into given categories; count the number of objects in each category, and sort the categories by count. (Limit category counts to be less than or equal to 10.) [K-MD3]