Florida B.E.S.T. MA.2.GR.1.2
The Standard
Categorize two-dimensional figures based on the number and length of sides, number of vertices, whether they are closed or not and whether the edges are curved or straight.
Florida B.E.S.T. Standards for Mathematics
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students examine flat figures and describe their sides, vertices, edges, and openings. They sort figures into groups using one or more of these attributes and explain their sorting rule.
What Mastery Looks Like
- Students accurately describe a figure using its visible attributes. They can sort the same set of figures in different ways and explain the rule used for each sort.
Common Misconceptions
- Students may count vertices as sides or treat curved edges as straight sides. They may also think turning or resizing a figure changes its category, or that every drawn figure must be closed.
How to Assess It
- Show a square, rectangle, circle, open four-segment figure, and irregular pentagon. Have students record each figure’s sides, vertices, edge type, closure, and one possible category.
Lesson moves
Ways to Teach It
Give pairs craft sticks and yarn to build figures, then label each by sides, vertices, edge type, and whether it is closed.
Ask students to write how a square and rectangle are alike and different, including side lengths and vertices.
Play an attribute sort game where students draw a figure card and place it under matching rule cards.
Take a classroom shape walk, sketch four objects, and record each object’s sides, vertices, edge type, and closure.
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Printable MA.2.GR.1.2 Worksheet
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