Download this free B1–B2 English worksheet PDF for English learners and teachers. This lesson explores the popular idea of the “lizard brain” and explains why modern neuroscience no longer accepts the simple three-layer model of the human brain.
Students practise reading comprehension, useful vocabulary, phrase matching and speaking skills through a real-world science and psychology topic about the brain, scientific myths, evidence, artificial intelligence and how outdated ideas can continue to spread. The worksheet is suitable for private English lessons, online classes, classroom teaching, homework and discussion practice.
The article explains the topic in clear, accessible English. Students learn about Paul MacLean’s mid-20th-century triune brain theory, which divided the brain into a reptile-like area for survival, a mammalian area for emotion and a newer outer layer for reason and language.
The worksheet then explains why this model breaks down when scientists compare different species. Many brain structures have ancient relatives across vertebrates, while emotion and thinking are deeply connected rather than belonging to completely separate layers.
Students also explore why simple scientific myths can survive for so long. Easy explanations are memorable, simple to teach and often repeated in self-help, advertising, management training, websites, search results and AI-generated summaries.
This worksheet helps B1–B2 learners discuss how people decide whether scientific information is reliable. Students talk about things they learned at school that later changed, scientific myths they still hear, whether simplified models are useful, and how they decide whether to trust information from search engines or AI tools.
The PDF includes a B1–B2 reading article, True / False questions, Phrase Match, Synonym Match, a task where students use new language, discussion questions and a full answer key.
Level: B1–B2
Date: 6 October 2026
Focus: reading, vocabulary, neuroscience, scientific myths, evidence, AI and speaking
This free worksheet includes:
- a B1–B2 reading article about the “lizard brain” myth
- an explanation of the triune brain theory
- discussion of what modern neuroscience says about brain evolution
- True / False comprehension questions
- Phrase Match practice with useful expressions
- Synonym Match vocabulary practice
- a sentence-writing task using new language
- discussion questions for Student A and Student B
- full answer key
The worksheet includes useful phrases such as caught on, hold on to, breaks down, point out, look into, take in, pass on, turn up, keep up with and fall back on. It also practises vocabulary such as ancient, modern, separate, rational, connected, familiar, unreliable, useful, simple and common.
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