Math - 2018-19

1.13 - Sort and Classify

The student will 

  • sort and classify concrete objects according to one or two attributes.

Adopted: 2016


  • So that I can count and group my toy in different ways, using different attributes


  • Sorting, classifying, and ordering objects facilitates work with patterns, geometric shapes, and data.
  • The same set of objects can be sorted and classified in different ways.
  • To classify is to arrange or organize a set of materials according to a category or attribute (a quality or characteristic). 
  • A Venn diagram can be a helpful tool when sorting by more than one attribute.
  • One way to explore attributes is to investigate non-examples (e.g., a triangle could be a non-example in a sort of rectangles and circles).
  • General similarities and differences among items are easily observed by primary students, who can begin to focus on more than one attribute at a time. During the primary grades, the teacher’s task is to move students toward a more sophisticated understanding of classification in which two or more attributes connect or differentiate sets, such as those found in nature (e.g., leaves with different colors and different shapes). 


The student will use problem solving, mathematical communication, mathematical reasoning, connections, and representations to

  • Sort and classify concrete objects into appropriate subsets (categories) based on one or two attributes, such as size, shape, color, and/or thickness (e.g., sort a set of objects that are both red and thick).
  • Label attributes of a set of objects that has been sorted.
  • Name multiple ways to sort a set of objects.


Updated: Aug 22, 2018