Exploring Shape Attributes

Standards

CCSS.MATH.CONTENT.2.G.A.1
Recognize and draw shapes having specified attributes, such as a given number of angles or a given number of equal faces. Identify triangles, quadrilaterals, pentagons, hexagons, and cubes.

CCSS.MATH.CONTENT.2.G.A.2
Partition a rectangle into rows and columns of same-size squares and count to find the total number of them.

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Learning Objectives

By the end of this lesson, students will:

• I can identify shapes by counting their sides and vertices.
• I can describe the differences between shapes based on their attributes (number of sides and vertices).
• I can engage in group discussions to share my observations about shapes.

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Success Criteria

• Correctly count and describe sides and vertices of a variety of shapes.
• Participate actively in group discussions using appropriate mathematical vocabulary.
• Differentiate between shapes using key attributes: number of sides and vertices.

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Content Vocabulary

• Side
• Vertex (plural: vertices)
• Corner
• Shape
• Triangle
• Quadrilateral
• Pentagon
• Hexagon

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Language Function

• Describing and comparing shapes by their attributes.
• Using precise math language (e.g., "This shape has 4 sides and 4 vertices.")
• Listening and responding to others' observations.

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Syntax and Discourse Structures

• Sentence frames for ELLs and language support:
  • "This shape has ___ sides."
  • "I notice that ___ has more/fewer sides than ___."
  • "Vertices are corners where two sides meet."

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Materials and Resources

• Shape manipulatives (plastic or foam triangles, quadrilaterals, pentagons, hexagons) — at least 5 sets for group work
• Chart paper or whiteboard for visual anchor charts
• Marker for drawing and labeling shapes
• Dyslexia-friendly shape cards with high-contrast colors and readable font (Open Dyslexic font preferred)
• Audio recording of simplified shape descriptions to support auditory learners
• Kinesthetic space for movement activity
• Individual whiteboards or paper for students
• Visual timer or clock

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Lesson Layout and Instructional Time

Activity	Time	Description
Opening/Engagement	5 min	Introduce essential question: "How can we tell different shapes apart?" Show real-life items.
Direct Instruction	10 min	Teacher models counting sides and vertices using large manipulatives and anchor charts.
Guided Practice	10 min	Students use shape manipulatives in small groups to count sides and vertices together.
Kinesthetic Exploration	8 min	"Shape Walk": Students use body to create shapes and count sides/vertices aloud in pairs.
Group Discussion	7 min	Groups share findings; teacher leads discussion focusing on vocabulary and comparisons.
Closure and Assessment	5 min	Recap with "I can" statements, quick quiz with individual whiteboards, and reflection.

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Detailed Lesson Plan

Opening/Engagement (5 minutes)

• Start with the essential question written on the board: "How can we tell different shapes apart?"
• Show a variety of objects (picture cards or classroom items like a book for rectangle, a clock for circle, a toy with triangular face).
• Ask: "What shapes do you see?"
• Briefly discuss: "What makes these shapes different?"

Direct Instruction (10 minutes)

• Introduce shape manipulatives and demonstrate:
  • Count the sides of a triangle aloud ("1, 2, 3 sides") and vertices ("3 corners").
  • Repeat for quadrilateral, pentagon, hexagon.
• Use anchor chart labeled with shape names and side/vertex counts.
• Read aloud audio recording describing shapes for auditory reinforcement.
• Use highlighted text cards to support dyslexic students.

Guided Practice (10 minutes)

• Divide class into 5 groups of 5 students.
• Give each group shape manipulatives.
• Task: "Count the sides and vertices of each shape and write down the numbers or draw the shapes with the correct number of sides on your whiteboards."
• Circulate and support groups, using sentence frames to scaffold language.

Kinesthetic Exploration (8 minutes)

• "Shape Walk" activity: In pairs, students use their arms and legs to form shapes on the floor/walls.
• Count sides and vertices aloud together as they pose into different shapes.
• Encourage descriptive language: "We made a triangle! It has 3 sides and 3 vertices!"
• This supports kinesthetic and social learners and ELLs by connecting movement with language.

Group Discussion (7 minutes)

• Regroup and invite spokespersons from each group to share findings.
• Use guiding questions:
  • "Which shape has the fewest sides?"
  • "What do you notice about the vertices in a pentagon compared to a triangle?"
• Write student observations on board, encouraging use of mathematical vocabulary and comparing shapes.

Closure and Assessment (5 minutes)

• Review the essential question by restating answers together: "We can tell shapes apart by counting their sides and vertices."
• Check understanding with a quick formative assessment: Show a shape card and have students write number of sides and vertices on whiteboards.
• End with "I can" statement reflection:
  • "I can count sides and vertices to describe shapes."
  • Ask: "Who feels confident about telling shapes apart?"
• Collect whiteboards for quick review.

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Differentiation Strategies

Learner Type	Strategy
English Language Learners	Use visuals, sentence frames, and repeated phrases; partner ELLs with bilingual peers; audio recording support.
Students with Dyslexia	Provide dyslexia-friendly reading materials with high contrast and specialized fonts; oral reading support.
Kinesthetic Learners	Shape Walk activity helps incorporate movement for better retention.
Advanced Learners	Challenge: Identify shapes with more sides (octagon, decagon), draw shapes with given sides, or create own shapes by combining attributes.
Students with Attention Difficulties	Use movement breaks, hands-on manipulatives to maintain engagement; clear, simple instructions.

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Extension Activities

• Design a shape collage using cutouts or digital tools, labeling each with sides and vertices.
• Introduce basic perimeter by using string around manipulatives to measure sides (non-metric for simplicity).
• Explore shapes in the classroom environment, taking photos and describing attributes at home or school.

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This structured yet interactive lesson plan integrates multisensory activities and language supports to ensure all 3rd graders in a U.S. classroom develop a strong foundational understanding of shape attributes consistent with Common Core standards. The kinesthetic and collaborative components foster engagement, while formative assessments monitor progress, addressing diverse learning styles and needs.