Science // Organisms & Life Processes

Effects of Drugs & Alcohol

Explain the effects of recreational drugs including alcohol, tobacco, and illegal substances on behaviour, health, and body systems, and distinguish between depressants, stimulants, and hallucinogens

Ages
13 to 14
Type
Concept
Builds on
2 topics
Leads to
0 topics
Standards
1 code

Quick check

If the learner saw a news story about drug misuse, could they explain what different types of drugs do to the body and behaviour — and why some are more harmful than others?

Ask this to see whether the topic is secure.

Topic // Mastery

What mastery looks like

What a learner can do once this topic is secure.
  • Categorises common recreational drugs as depressants, stimulants, or hallucinogens
  • Explains specific effects of alcohol and tobacco on the body (e.g. liver damage, lung cancer)
  • Discusses the difference between physical and psychological dependence

Topic // Map

Where this fits

What to learn first and what this topic opens up, with the reason for each link. Required links come first.
  • RequiredMust come first
  • HelpfulHelps, but not essential

Before this

2 topics
  • Diet, Exercise & LifestyleRequired

    Organisms & Life Processes // Ages 10 to 11

    KS3 recreational drugs (mechanisms, categories) extends KS2 recognition that drugs and lifestyle affect health

  • Digestion & EnzymesHelpful

    Organisms & Life Processes // Ages 11 to 13

    Drug effects on the body are best understood in context of the organ systems they affect, including the digestive system

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Effects of Drugs & Alcohol

Ages 13 to 14 // Concept

Leads to

0 topics

Nothing in the catalogue builds on this topic yet. Browse Organisms & Life Processes

Topic // Research-informed

Teaching notes

From the Marble Skill Taxonomy. These notes have not been validated in classrooms, so treat them as a starting point for your own judgement.

The approach

Learners (ages 13–14) study how recreational drugs act on the body as chemicals that change how a body SYSTEM works — framed mechanistically and non-judgementally. Core tasks: classify drugs as depressants (slow the nervous system, e.g. alcohol), stimulants (speed it up, e.g. nicotine, caffeine) or hallucinogens (distort perception); attach specific organ harms to alcohol (liver damage/cirrhosis, impaired judgement and reactions) and tobacco (lung disease and cancer, cardiovascular harm); and distinguish physical dependence (body adapts, withdrawal) from psychological dependence (craving/compulsion). A body-map reveal activity, a probing in-role dialogue, a classification check, and an optional reaction-time model each address different facets. All content must be age-appropriate, non-sensational and safeguarding-aware.

Common misconceptions

  • Thinking alcohol is a stimulant because it can make people lively — it is a depressant.
  • Believing dependence is only physical (missing psychological dependence/craving).
  • Assuming legal drugs (alcohol, tobacco) are therefore harmless.
  • Thinking harm is only immediate, missing long-term/cumulative organ damage.
  • Treating all illegal drugs as identical rather than having different classes and effects.

Useful representations

  • Body-map of organ-specific effects (liver, lungs, brain, heart)
  • Depressant / stimulant / hallucinogen classification chart tied to nervous-system effect
  • Physical vs psychological dependence comparison
  • Reaction-time / behaviour change illustration for depressants vs stimulants

Teaching practices

  • Frame drugs mechanistically and non-judgementally — a chemical that changes how a body system works — rather than moralising, which improves both accuracy and engagement.
  • Anchor classification (depressant/stimulant/hallucinogen) to the nervous-system effect, then attach specific organ harms for alcohol and tobacco.
  • Separate physical from psychological dependence explicitly, as pupils routinely conflate them.
  • Use accurate, age-appropriate, non-sensational information and attend to safeguarding and pupils' personal contexts.
  • Connect effects to the body systems already studied (nervous, circulatory, respiratory, liver) so it consolidates prior learning.

Activities to try

  1. 1

    Tappable body-map of drug effects with myth-busting flaps

    Why it works: A drug is a chemical that changes how a specific body system works. It can cause short-term changes in behaviour and, for some drugs (especially with heavy or long-term use), long-term organ damage. Effects vary with the drug, the dose and the person, so drugs are not simply 'good' or 'bad'.

    1. Tap an organ on a body diagram to reveal the specific effect: liver → 'alcohol is broken down here; heavy use scars it (cirrhosis)'; lungs → 'tobacco smoke damages airways and causes cancer'; brain → 'depressants slow nerve signals, stimulants speed them up'; heart → tobacco's cardiovascular harm.
    2. Use a side panel to sort each named drug (alcohol, nicotine, caffeine, a hallucinogen) into depressant / stimulant / hallucinogen by its nervous-system effect.
    3. Open lift-the-flap myth-busters and predict the answer before revealing: 'Is alcohol a stimulant?' → 'No — it is a depressant that slows you down, which is why it impairs reactions.' / 'Can you be dependent without physical withdrawal?' → 'Yes — psychological dependence (craving) is real.'
  2. 2

    In-role conversation with a GP or addiction nurse

    Why it works: Behaviour, decision-making and dependence can be explored through responsive dialogue that probes a learner's reasoning, complementing the factual organ-effect core.

    1. Ask an in-role GP or addiction nurse age-appropriate questions about how alcohol and tobacco affect the body, why dependence develops, and how to make safe choices.
    2. Explain your own reasoning about a scenario (e.g. why someone might keep using a drug they know is harmful) and have it probed Socratically.
    3. Work through why physical dependence (withdrawal symptoms) differs from psychological dependence (craving, compulsion) in a real question-and-answer exchange.
  3. 3

    Classification and drug→organ check

    Why it works: Secure recall of the classification and specific organ harms, and of the physical/psychological dependence distinction.

    1. Categorise named drugs as depressant, stimulant or hallucinogen.
    2. Match each drug to the main organ(s) it harms (e.g. alcohol → liver/brain; tobacco → lungs/heart).
    3. Answer items distinguishing physical from psychological dependence.

Topic // Standards

Curriculum standards

Codes for the curriculum statements this topic maps to. Each publisher owns its standard text.
The national curriculum in England: Key stages 1 and 2 framework document
KS3.Sci.Bio.Health.2

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