Sorting Shapes by Attributes

Standards

Common Core State Standards (Grade 3 Mathematics):

• CCSS.MATH.CONTENT.3.G.A.1: Understand that shapes in different categories (e.g., rhombuses, rectangles, and others) may share attributes (e.g., having four sides), and that the shared attributes can define a larger category (e.g., quadrilaterals). Recognize rhombuses, rectangles, and squares as examples of quadrilaterals.
• CCSS.MATH.CONTENT.3.G.A.2: Partition shapes into parts with equal areas. Express the area of each part as a unit fraction of the whole.

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Learning Objectives (“I can” statements)

• I can group shapes by their color, size, and shape.
• I can explain why I grouped shapes in a certain way.
• I can use sorting mats to organize shapes based on their attributes.
• Success Criteria:
  • Correctly identify and describe attributes of shapes.
  • Independently sort shapes into categories using multiple attributes.
  • Participate actively in group discussions explaining sorting choices.

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Essential Question

How can we group shapes based on their attributes?

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Content Vocabulary

Term	Definition
Attribute	A characteristic or feature of an object, like color or size.
Sort	To arrange things into groups based on shared attributes.
Shape	The form of a figure such as a circle, square, or triangle.
Category	A group of items sharing one or more common features.
Quadrilateral	A shape with four sides.
Size	How big or small a shape is.

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Language Functions, Syntax, and Discourse

• Language Function: Describe, compare, and explain reasoning.
• Useful Sentence Frames:
  • “I grouped these shapes because they have the same _______.”
  • “These shapes are different/similar because _______.”
  • “I noticed that the ______ is/are ______.”
• Discussion Practice: Guided partner talk and group sharing.

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Materials and Resources

• Shape cards of varying colors, sizes, and shapes (e.g., circles, squares, triangles, rectangles, hexagons) (dyslexia-friendly: clear font, high contrast)
• Sorting mats labeled with different attributes (color, size, shape)
• Whiteboard and markers
• Paper and crayons for drawing their own shapes
• Timer or clock for activity management
• Magnets or Velcro for flexible sorting on boards
• Digital slideshow or interactive whiteboard with shapes (optional for visual learners)

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Lesson Timeline & Activities

Time	Activity	Description	Differentiation & Supports
5 min	Introduction & Review	Review attributes of shapes with visuals and quick questions. Introduce the essential question.	Use gestures, visuals, repeat key vocabulary for ELLs.
10 min	Mini-Lesson: Sorting by Attributes	Teacher models sorting using shape cards and sorting mats. Emphasize multiple attributes.	Dyslexia-friendly cards with clear fonts; use colors.
15 min	Guided Practice (Group Activity)	Students work in groups of 4–5 to sort shape cards by given attributes on mats. Each student describes their sorting choice using sentence frames. Teacher circulates.	Mixed-ability groups; provide sentence frame cards; visuals for support.
10 min	Independent Practice	Students choose 3 attributes to sort a new set of shapes independently and write/draw their reasoning.	Provide graphic organizers; offer verbal or drawing responses for writing challenges.
5 min	Closure & Discussion	Groups share their sorting and reasoning with the class. Reflect on how shapes can belong to multiple categories. Recap key terms.	Use think-pair-share for language support.

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Assessment

• Formative Assessment:
  • Observe and note student participation during group sorting.
  • Listen for use of attribute vocabulary and sentence frames.
  • Review independent work for correct sorting and reasoning.
• Success Criteria:
  • Accurate grouping by one or more attributes.
  • Ability to articulate sorting rationale.
  • Active engagement in peer discussions.

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Differentiation Strategies

• For ELLs:
  • Use visuals and gestures consistently.
  • Provide sentence frames and bilingual word cards if needed.
  • Allow answers in first language if necessary during discussion.
• For Students with Dyslexia:
  • Use dyslexia-friendly fonts and high-contrast cards.
  • Provide oral instructions and clarifications.
  • Allow drawing or verbal explanations instead of writing.
• For Advanced Learners:
  • Encourage sorting based on two or more attributes simultaneously.
  • Introduce simple classification language (e.g., subsets, hierarchy).
  • Propose extension: designing their own complex shape puzzle or board game using classification.

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Extension Activity (Advanced Learners)

• Create a “Shape Detective” challenge: Students select daily objects (photographed or drawn) and sort them by similar attributes. Present their findings to the class, using mathematical vocabulary.

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Multiple Intelligences Integration

Intelligence	Implementation in Lesson
Visual-Spatial	Shape cards, sorting mats, drawing activities.
Kinesthetic	Moving shape cards to mats physically.
Linguistic	Sentence frames, discussion, vocabulary focus.
Interpersonal	Group sorting and sharing activities.
Logical-Mathematical	Recognizing attributes and classification.

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This detailed lesson plan supports a wide variety of learners while meeting rigorous Common Core standards. The use of engaging tactile activities combined with language supports and formative assessments helps all students succeed in understanding the classification and sorting of shapes by attributes.