• Quick retrieval from earlier learning (Is the evidence relevant and sufficient?). Students answer on mini whiteboards.
• Show answers together and note who needs support in the main task.

1. Judge the evidence for this claim. Claim: The new reading app improves reading scores. Evidence: One pupil said she reads more now. (relevant and sufficient / relevant but not sufficient / not relevant) → relevant but not sufficientPrompt: Relevant: is the evidence actually about the claim?
2. Which claim and evidence pair matches this judgement: not relevant? (Claim: Cycling to school is safe in our town. Evidence: Police data shows no serious cycling accidents near local schools in five years, after new cycle lanes were built. / Claim: Our school should switch to LED lights. Evidence: A council energy audit of our building found LED lights would cut the lighting bill by 60% and pay for themselves in two years. / Claim: The beach needs more bins. Evidence: Seagulls are noisy birds.) → Claim: The beach needs more bins. Evidence: Seagulls are noisy birds.Prompt: Relevant: is the evidence actually about the claim?
3. Judge the evidence for this claim. Claim: Cycling to school is safe in our town. Evidence: I cycled to school last Tuesday and nothing happened. (relevant and sufficient / relevant but not sufficient / not relevant) → relevant but not sufficientPrompt: Relevant: is the evidence actually about the claim?

• Read the first lines of a short text aloud and ask what students predict will happen and why.
• Share the objective: Spotting faulty reasoning: bandwagon, slippery slope, ad hominem…. Read the success criteria together.

• Work through the example out loud, saying why you do each step, not just what you do.
• Example: Which fallacy matches this description? Presenting only two options when more exist.
• Step 1: A fallacy is a flaw in reasoning that can make a weak argument sound convincing.
• Step 2: false dilemma: Presenting only two options when more exist.
• Step 3: So the answer is: false dilemma
• Answer: false dilemma
• Pause after each step and ask a student to say what comes next.

• Do these together. Students try each step on whiteboards before you reveal it.
• Use the hints as prompts rather than giving the answer.

1. Which fallacy matches this description? Claiming one small step will inevitably lead to a chain of extreme results. (ad hominem / bandwagon / slippery slope / false dilemma) → slippery slopePrompt: Think about what each kind of faulty argument does wrong.
2. Which fallacy is used here? Everyone in our year has this app, so it must be safe. (hasty generalisation / bandwagon / ad hominem / false dilemma) → bandwagonPrompt: Does it attack a person, follow the crowd, offer only two options, generalise from a few cases, or predict a chain of disasters?

• Students work on the student sheet. Circulate and check the first two answers of every student early.
• Students who finish: write a question of their own for a partner, with the answer.

The 6 questions are on the student sheet below, with answers in the key.

• Two questions on their own. Sort answers into got it / nearly / not yet to plan the next lesson.

1. Which fallacy is used here? My first two maths tests were hard, so all maths tests are impossible. (slippery slope / hasty generalisation / false dilemma / bandwagon) → hasty generalisationPrompt: Does it attack a person, follow the crowd, offer only two options, generalise from a few cases, or predict a chain of disasters?
2. Type the fallacy (in English) that matches this description. Presenting only two options when more exist. → false dilemmaPrompt: Think about what each kind of faulty argument does wrong.

Free online practice with hints and printable worksheets for this skill: eurekami.com/english/grade-8.