2022 K-GM-1-2

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K.GM.1.2

K.GM.1.2 Sort two-dimensional objects using characteristics such as shape and size.

In a Nutshell

This objective states that students are expected to sort objects by their similar characteristics including shape and size. This can be done while students explore their surroundings and engage in play, centers, and whole-group activities. The ability to identify similarities and differences is essential for students to be able to sort and group objects.

Student Actions	Teacher Actions
Build conceptual understanding by grouping objects with similar characteristics. Communicate mathematically by explaining how the objects are sorted.	Building procedural fluency by providing multiple opportunities for students to sort objects in a variety of settings (e.g., snack time, at play, etc.) Facilitate meaningful mathematical discourse by having students share and discuss their sorting thought process. Support productive struggle and ask questions to promote thinking without answering. (e.g., “What is another way these same objects could be sorted?”)
Key Understandings	Misconceptions
Objects can be put into groups by their characteristics. One object can have a variety of characteristics.	Put objects in a graduated order instead of grouping them by characteristics. There is only one way to sort a group of objects (e.g., only by size or shape or color, etc.)
Knowledge Connections
Prior Knowledge	Leads to
Identify measurable attributes of objects. Describe them using age-appropriate vocabulary. (PK.GM.2.1) Directly compare two objects with a common measurable attribute using age-appropriate vocabulary. (PK.GM.2.2) Sort objects into sets by one or more attributes. (PK.GM.2.3)	Identify three-dimensional shapes and their attributes (1.GM.1.4)