Overview

Grade: 6th
Duration: 30 minutes
Class Size: 18 students
Unit: Exploring Expressions & Equations
Lesson: 1 of 3
Title: Understanding Expressions

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Common Core State Standards Addressed

• CCSS.MATH.CONTENT.6.EE.A.2
  Write, read, and evaluate expressions in which letters stand for numbers.
• CCSS.MATH.PRACTICE.MP2
  Reason abstractly and quantitatively.
• CCSS.MATH.PRACTICE.MP4
  Model with mathematics.

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Learning Objectives

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

• I can identify an algebraic expression and explain how it is different from an equation.
• I can recognize variables and constants within an expression.
• I can explain in my own words the role variables play in expressions.

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Success Criteria

Students are successful if they can:

• Correctly label parts of an algebraic expression (variables, constants, operators).
• Distinguish expressions from equations when shown examples.
• Offer a clear verbal or written definition of an algebraic expression.
• Participate actively in a hands-on activity to build and explore expressions.

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Materials Needed

• Whiteboard and markers
• Pre-prepared flashcards: variables (e.g., x, y), constants (numbers 1-20), and operation symbols (+, −, ×, ÷)
• Index cards with sample expressions and equations
• “Expression Builder” kits (small envelopes with variable, constant, and operator cards)
• Dyslexia-friendly printed glossary of terms and examples (using a dyslexia-friendly font like OpenDyslexic, with color coding for variables and numbers)
• Visual poster illustrating example expressions vs equations

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Lesson Breakdown

1. Warm-Up & Introduction (5 minutes)

• Begin with a quick question: “What comes to mind when you hear the word 'expression' in math?” – write down key ideas.
• Show a poster comparing an expression (e.g., 3x + 5) and an equation (3x + 5 = 20).
• Use "I can" and success criteria statements on the board for reference.
• Explain the day’s focus: understanding what an algebraic expression is and what makes it different from an equation.

Differentiation tip:

• Provide glossary cards with simple, concise definitions for students who need extra support.
• Use visuals and color coding consistently to support dyslexic learners.

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2. Direct Instruction & Exploration (10 minutes)

• Define:
  • Algebraic Expression: combination of variables (letters), constants (numbers), and operations (like + or −) but no equals sign.
  • Variable: a letter that represents a number you don’t know yet.
  • Constant: a fixed number.
• Display several examples of different expressions and equations on the board; ask students to volunteer to say which is which and why.
• Encourage students to identify variables and constants in each, using flashcards to "tag" examples as a group.

Differentiation tip:

• Pair students to verbalize their thought process before answering aloud to build confidence.
• Use manipulatives (flashcards) to help kinesthetic learners.

Dyslexia-friendly reading:

• Use color coding (blue for variables, green for numbers) and clear spacing in examples.

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3. Hands-On Activity: Expression Builder (10 minutes)

• Divide students into 6 groups of 3.
• Give each group an "Expression Builder" kit (variable, constant, and operator cards).
• Challenge: Build at least 3 different algebraic expressions and write them down.
• Once done, groups share their expressions aloud, identifying variables and constants.

Differentiation tip:

• For students who struggle, provide partially completed expressions to finish.
• For advanced learners, encourage them to create expressions with multiple terms (e.g., 2x + 5y − 3).

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4. Review & Formative Assessment (5 minutes)

• Quick quiz: Show 5 cards (some expressions, some equations). Students hold up a thumbs-up for expressions and thumbs-down for equations.
• Ask 2-3 randomly selected students to explain their choice briefly.
• Recap key ideas using "I can" statements.
• Remind students the next lesson will build on this to write and evaluate expressions.

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Extension Activities (For Advanced Learners)

• Create expressions involving more variables and different operations.
• Explore simple expressions with powers (exponents), e.g., x² + 3.
• Write a short story problem that can be modeled by an algebraic expression.

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Differentiation Strategies

• Use visual aids and color-coded materials.
• Provide audio recordings of glossary definitions for students with reading difficulties.
• Pair students for peer support and guided discussion.
• Give extra time or simplified tasks to students needing additional support.

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Reflection & Teacher Notes

• Note which students confidently distinguished expressions from equations.
• Identify those who benefited from manipulative use and buddy pairing.
• Plan to revisit tricky concepts or provide additional scaffolds in Lessons 2 and 3.

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Dyslexia-Friendly Tips

• Use sans-serif, dyslexia-friendly fonts in all handouts.
• Incorporate generous spacing between letters and lines.
• Use color to differentiate parts of expressions (variables vs. constants).
• Allow oral responses and accept drawings or models of expressions as part of assessment.

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End of Lesson 1: Understanding Expressions