Epidemiology: Patterns of Disease

Active learning works because epidemiology relies on interpreting patterns in real data. Students need to move between datasets, graphs, and simulations to turn abstract terms like incidence and prevalence into concrete understanding.

• Year 12
• Biology
• 4 activities
• 40 min–50 min

Learning Objectives

1. Calculate incidence and prevalence rates for a given infectious disease scenario.
2. Classify disease outbreak patterns as endemic, epidemic, or pandemic, citing specific historical examples.
3. Analyze provided epidemiological data to propose a targeted public health intervention.
4. Evaluate the potential impact of international travel on the global spread of a novel pathogen.
5. Compare and contrast the characteristics of different types of disease outbreaks.

Ready-to-Use Activities

Jigsaw

⏱ 50 min·Small Groups

Jigsaw: Outbreak Patterns

Divide class into expert groups on endemic, epidemic, or pandemic; each researches definitions, examples, and graphs using provided resources. Experts then mix into new jigsaw groups to teach peers and co-create comparison charts. Conclude with whole-class gallery walk.

Prepare & details

Differentiate between an epidemic and a pandemic using historical examples.

Facilitation Tip: During Jigsaw Expert Groups, assign each group a unique outbreak example so students teach one another the differences between endemic, epidemic, and pandemic patterns.

Setup: Flexible seating for regrouping

Materials: Expert group reading packets, Note-taking template, Summary graphic organizer

• Understand
• Analyze
• Evaluate
• Relationship Skills
• Self-Management

Inquiry Circle

⏱ 45 min·Small Groups

Data Stations: Incidence vs Prevalence

Set up stations with disease datasets from sources like WHO; students calculate rates, plot graphs, and compare across outbreaks. Rotate every 10 minutes, recording findings on shared worksheets. Discuss patterns as a class.

Prepare & details

Analyze how epidemiological data informs public health responses to infectious diseases.

Facilitation Tip: At Data Stations, set timers for each graph so students practice calculating incidence and prevalence under pressure, then compare results in pairs.

Setup: Groups at tables with access to source materials

Materials: Source material collection, Inquiry cycle worksheet, Question generation protocol, Findings presentation template

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Simulation Game

⏱ 40 min·Pairs

Simulation Game: Global Travel Spread

Use cards representing travelers and pathogens; students simulate spread across 'continents' by passing cards in rounds, adjusting for travel rates. Track incidence over 'weeks' and graph results. Debrief on prevention factors.

Prepare & details

Predict the potential impact of global travel on the spread of emerging infectious diseases.

Facilitation Tip: In the Global Travel Spread simulation, ask students to pause after each round to predict how the next flight route will change the outbreak map.

Setup: Flexible space for group stations

Materials: Role cards with goals/resources, Game currency or tokens, Round tracker

• Apply
• Analyze
• Evaluate
• Create
• Social Awareness
• Decision-Making

Inquiry Circle

⏱ 50 min·Whole Class

Case Study Debate: Public Health Responses

Assign historical outbreaks; pairs prepare arguments for interventions like lockdowns versus herd immunity. Debate in whole class, using epi data to support claims. Vote and reflect on evidence strength.

Prepare & details

Differentiate between an epidemic and a pandemic using historical examples.

Setup: Groups at tables with access to source materials

Materials: Source material collection, Inquiry cycle worksheet, Question generation protocol, Findings presentation template

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Teaching This Topic

Start with concrete examples students can visualize. Avoid launching straight into definitions. Use research-backed strategies like jigsaw learning to distribute cognitive load and peer teaching to reinforce understanding. Always connect calculations back to real-world decisions in public health.

What to Expect

By the end of these activities, students will confidently distinguish incidence from prevalence, classify outbreaks correctly, and explain the role of travel in global spread using evidence from multiple sources.

Watch Out for These Misconceptions

Common Misconception

During Data Stations: Incidence vs Prevalence, watch for students who assume the two measures are interchangeable.

What to Teach Instead

At each station, have students compute both values from the same dataset and present their findings to another pair, forcing them to articulate why incidence shows spread speed while prevalence shows total burden.

Common Misconception

During Simulation: Global Travel Spread, watch for students who call any widespread outbreak a pandemic.

What to Teach Instead

After the simulation, display a world map with flight routes and ask groups to define the threshold for pandemic classification, using their own data to justify where the line should be drawn.

Common Misconception

During Jigsaw Expert Groups: Outbreak Patterns, watch for students who claim all endemic diseases are mild or rare.

What to Teach Instead

In expert groups, include examples like malaria or Lyme disease where endemic status does not mean minor impact. Require each group to prepare a one-sentence summary correcting this assumption based on their case study.

Assessment Ideas

Quick Check

After Jigsaw Expert Groups, give students a new outbreak scenario with case numbers and population data. Ask them to calculate incidence, classify the event, and justify their choice using terms from their expert group discussions.

Discussion Prompt

During Case Study Debate: Public Health Responses, circulate and listen for students using terms like incidence, prevalence, and pandemic accurately when explaining how a public health response affected disease spread.

Exit Ticket

After Data Stations: Incidence vs Prevalence, hand out two unlabeled graphs and ask students to attach the correct term and one sentence explaining their reasoning, collecting responses to check for accurate pattern recognition.

Extensions & Scaffolding

• Challenge: Provide an anonymized WHO dataset from an unexplained outbreak and ask students to calculate incidence, prevalence, and classify the event using only the data.
• Scaffolding: For the Data Stations, provide pre-filled templates with formulas so students focus on interpreting results rather than computation.
• Deeper exploration: Ask students to research an emerging disease and prepare a 3-minute briefing linking its spread pattern to travel networks, incidence rates, and public health responses.

Key Vocabulary

Incidence	The rate of new cases of a disease occurring in a population over a specific period, often expressed per 100,000 people.
Prevalence	The total number of existing cases of a disease in a population at a specific point in time or over a period, including new and old cases.
Endemic	A disease that is constantly present at a low, predictable level within a specific geographic region or population.
Epidemic	A sudden and significant increase in the number of cases of a disease above what is normally expected in a particular region or community.
Pandemic	An epidemic that has spread over several countries or continents, affecting a large number of people globally.