Overview

This 30-minute lesson introduces Grade 4 students to fractions in an engaging, hands-on way, aligned with the Alberta Mathematics Curriculum, specifically focusing on the concept of fractions as part of a whole and comparing simple fractions. The lesson combines visual, tactile, and cognitive activities to build conceptual understanding, with an emphasis on practical learning and formative assessment.

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Curriculum Alignment

Grade 4 Mathematics - Number Strand (Alberta Program of Studies)
Specific Learning Outcomes:

• 4NA3: Represent and compare fractions, including halves, thirds, fourths, sixths, and eighths, using concrete materials, drawings, and number lines.
• 4NA4: Demonstrate understanding of the meaning of a fraction as part of a whole and part of a set.
• 4NA5: Use concrete materials to model and solve problems involving addition and subtraction of fractions with like denominators (preparation for future learning).

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Learning Goals

By the end of this lesson, students will be able to:

• Understand fractions as parts of a whole using visual and physical models.
• Identify and name fractions using appropriate vocabulary (e.g., numerator, denominator).
• Compare simple fractions like halves, thirds, and fourths using hands-on activities.
• Express understanding through a formative worksheet targeting these skills.

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Materials Needed

• Fraction circles or fraction bars (concrete manipulatives) — enough sets for 4-5 students per set
• Whiteboard and markers
• Individual mini whiteboards and markers for students (optional)
• Paper plates (for cut-and-fold fraction activity)
• Worksheets for assessment (included in description below)
• Large number line banner or tape on floor
• Scissors and coloured pencils/crayons

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Lesson Sequence

1. Introduction (5 mins)

• Activation: Begin with a relatable question: “If I share my chocolate bar with my three friends equally, what fraction of the bar does each person get?”
• Explain: Introduce the vocabulary “fraction,” “numerator,” and “denominator.” Use a fraction circle to demonstrate 1/4, naming numerator and denominator clearly.
• Connect: Relate the fraction 1/4 to the parts of a pizza or chocolate to make it tangible.

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2. Hands-On Activity: Fraction Plates (10 mins)

• Distribute paper plates and scissors.
• Guide students to fold plates in halves, then into quarters.
• Students colour each fraction segment differently (e.g., halves in blue, quarters in red).
• Ask: “Show me 1/2? 1/4? How many quarters make a half?”
• Students discuss in pairs and share with class, using the vocabulary.
• Teachers circulate to facilitate and assess understanding.

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3. Manipulatives Exploration & Comparing Fractions (8 mins)

• Students work in small groups with fraction circles or bars.
• Challenge: “Can you find two fractions where one is larger than the other?” (e.g., 1/2 and 1/3).
• Demonstrate on the whiteboard how 1/2 is bigger than 1/3 by comparing fraction pieces.
• Use the number line on floor to have students physically stand on points representing different fractions.
• Discuss which fractions are closer to 0 or 1.

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4. Worksheet: Checking for Understanding (5 mins)

• Distribute a brief worksheet with:
  • Matching fractions with pictures (e.g., circle divided into 4 parts with one shaded → 1/4),
  • Simple fraction comparison problems (circle the larger fraction),
  • Fill in the numerator or denominator in given fraction templates.
• Students complete independently or with minimal support.

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5. Extension Activity for Advanced Learners

• Students who finish early are challenged to investigate adding fractions with like denominators using fraction bars (e.g., 1/4 + 2/4 = 3/4).
• Quick problem-solving task: “If you eat 2/4 of a pizza, how much is left?”
• Encourage them to illustrate their solutions and explain orally to the class or teacher.

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Assessment & Reflection

• Formative Assessment: Observe students during the folding and manipulatives work for correct use of terminology and conceptual understanding.
• Review completed worksheets to identify students needing further support or extension.
• Use a quick thumbs up/down after explaining fractions to gauge understanding.

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Differentiation Tips

• For students requiring support: Use fewer fraction segments (halves only) before moving to quarters.
• For English Language Learners: Use visual vocabulary cards showing numerator, denominator, and fraction names.
• For advanced learners: Introduce concept of equivalent fractions using fraction bars (e.g., 2/4 = 1/2).

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Teacher Reflection

Encourage teachers to reflect on:

• How effectively did the hands-on activities support student understanding?
• Were students able to use correct fraction vocabulary?
• Did the number line activity enhance understanding of fraction magnitude?

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Worksheet Sample Description (Teacher Use)

Part A: Colour the fraction shown on the figure.
Part B: Circle the larger fraction: 1/2 or 1/3?
Part C: Fill in the numerator: ___/4 (with a picture showing 3 pieces shaded).
Part D (Extension): Show 1/4 + 2/4 using pictures or fraction bars.

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This lesson creates a dynamic and tactile approach to fractions that aligns with the Alberta Curriculum, inspiring student engagement, understanding, and confidence in foundational fraction skills.