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Overview

This 60-minute lesson is designed for a low ability Year 10 science class following the AQA Combined Science curriculum within the National Curriculum for England. It focuses on introducing and reinforcing the concept of covalent bonding, ensuring accessibility and engagement for SEND students and those with reading difficulties.

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National Curriculum Links

• Science (Chemistry) - Key Stage 4 (Years 9-11) - AQA Combined Science (Trilogy) Chemistry
• Atomic structure and the periodic table
• Chemical bonding, structure and the properties of matter
• Learning Aim: Understand that atoms share pairs of electrons to form covalent bonds.

Referencing:

• National Curriculum 2015 - Programme of Study - Chemistry - KS4
• AQA Combined Science Trilogy Specification – Topic 3: Atomic Structure and the Periodic Table
• Specifically: "Describe covalent bonding as a pair of electrons shared between two atoms" and "Use dot-and-cross diagrams to represent covalent bonds."

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Learning Objectives

By the end of the lesson, learners will be able to:

1. Define covalent bonding and explain that it involves sharing electrons between atoms.
2. Draw and interpret simple dot-and-cross diagrams to represent covalent bonds.
3. Identify where covalent bonds occur in simple molecules like H₂, O₂, and H₂O.

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Success Criteria

Students will demonstrate success when they can:

• Verbally explain what a covalent bond is in simple terms.
• Complete labelled dot-and-cross diagrams of molecules accurately.
• Identify and explain at least 2 examples of covalent molecules.

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Resources

• Large magnetic or laminated atom models (hydrogen, oxygen)
• Printed dot-and-cross worksheets with simple molecules (H₂, Cl₂, H₂O, CH₄)
• Visual aids with simplified electron shells and covalent sharing
• Dyslexia-friendly worksheets – cream background, clear fonts (e.g., Comic Sans or Arial)
• Coloured pens/pencils
• Whiteboard and marker

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Lesson Structure (60 minutes)

Starter Activity (10 mins)

“Electron Match-Up” Group Game

• Split class into 7 groups of 4.
• Each group gets cut-outs of “electron cards” (single electrons).
• Challenge: How do two atoms “share” electrons to become stable?
• Encourage tactile manipulation with modelling or cards.
• Teacher introduces the term “covalent bond” as sharing electrons.

Differentiation: Provide visual and physical electron models for SEND learners.

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Main Activity (35 mins)

Part 1: Teacher Explanation (10 mins)

• Use simple language and visual aids to explain:
  • Atoms want full outer shells (e.g., 2 for H, 8 for others).
  • Covalent bonding = shared pair of electrons between atoms.
  • Show examples: H₂, O₂ molecules.

Part 2: Interactive Dot-and-Cross Workshop (20 mins)

• Distribute dyslexia-friendly dot-and-cross worksheets.
• Model drawing covalent bonds for H₂ (each H shares 1 e⁻).
• Students draw bonds for Cl₂ and H₂O in pairs.
• Walk round giving hands-on support and praise.

Differentiation:

• For SEND learners, provide partially completed diagrams to label.
• For visual learners, use coloured pencils marking different atoms’ electrons.

Part 3: Practical Analogy (5 mins)

• Use a “sharing” analogy: Two friends sharing a pair of headphones to explain the bond.
• Engage students in explaining the analogy back to the class.

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Plenary (10 mins)

Mini-quiz and Reflection

• Use simple true/false or multiple-choice quiz questions on covalent bonding (verbally or written).
• Students write one thing they learned and one question on mini whiteboards.
• Teacher collects questions for next lesson focus or addresses common misunderstandings.

Extension for advanced learners:

• Ask to draw dot-and-cross diagrams for methane (CH₄) or ammonia (NH₃).
• Challenge: Explain why noble gases do not form covalent bonds.

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Assessment

• Formative through observation during workshop and electron card activity.
• Check students’ dot-and-cross diagrams for accuracy.
• Use plenary quiz responses as immediate feedback and assessment of understanding.

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Differentiation & SEND Strategies

• Use multi-sensory resources (manipulatives, visuals, analogy).
• Simplify language and avoid jargon. Use clear, dyslexia-friendly fonts and layouts.
• Provide work scaffolding (partially completed diagrams).
• Small group support for learners needing extra help; peer-support in pairs.

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Extension Activities

• Research covalent bonding in more complex molecules (e.g., CO₂, NH₃).
• Create 3D models of covalent molecules using kit materials or household items.
• Investigate differences between covalent and ionic bonding through Venn diagrams.

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Additional Notes

• Ensure consistent use of UK spelling (e.g., ‘behaviour’, ‘organise’, ‘labelling’).
• Visuals to use clear colour contrasts and avoid overcrowding to support dyslexic pupils.
• Emphasise everyday relevance (water, oxygen molecules) to enhance engagement.

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Summary

This lesson plan aligns tightly with the National Curriculum Key Stage 4 Programme of Study and the AQA specification, uses inclusive SEN and dyslexia-friendly strategies and activities to engage low ability Year 10 learners effectively, and provides challenge and interest to stretch advanced learners.