# 1.13 - Sort and Classify

The student will

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

### BIG IDEAS

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

### UNDERSTANDING THE STANDARD

• 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).

### ESSENTIALS

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.

### KEY VOCABULARY

Updated: Aug 22, 2018