Lesson Plan

• Describe what amphoteric oxides are and how they behave in acid–base reactions.
• Write balanced chemical equations for the reaction of a given amphoteric oxide with an acid and with a base.
• Identify common amphoteric oxides (Al₂O₃, ZnO, PbO, Cr₂O₃) and predict the products formed.
• Explain why both reactions produce a salt and water.

• Projector or interactive whiteboard
• Chemistry textbook or IGCSE handout
• Worksheet with reaction equations
• Sample diagrams of amphoteric oxide reactions
• Whiteboard and markers
• Calculator (optional)

Begin with a short video showing aluminium oxide reacting with an acid and with a base, prompting students to observe the differences. Recall previous learning on acidic and basic oxides and state the success criteria: students will be able to describe amphoteric behaviour and write the corresponding balanced equations.

1. Do‑now (5'): Students list examples of acidic and basic oxides from the previous lesson.
2. Mini‑lecture (10'): Define amphoteric oxides, present general reaction formulas, and introduce common examples.
3. Guided practice (12'): Work through aluminium oxide reactions with acid and base on the board while students complete a worksheet.
4. Group activity (10'): Teams use cards for ZnO, PbO, and Cr₂O₃ to write balanced equations for both acid and base reactions.
5. Check for understanding (8'): Quick quiz (Kahoot) on key concepts and product identification.
6. Summary & questions (5'): Teacher recaps main ideas and addresses any misconceptions.

Summarise that amphoteric oxides react with both acids and bases to give a salt and water, highlighting the four IGCSE examples. Students complete an exit ticket by writing one balanced equation for a chosen oxide. For homework, assign textbook exercises on classifying oxides and balancing the corresponding reactions.