Geography · Year 12

Active learning ideas

Erosional Landforms: Cliffs, Arches, Stacks

Active learning works for this topic because erosion processes unfold over long timescales, making hands-on modeling and sequencing essential for students to grasp change over time. Concrete experiences with materials and images help students move beyond textbook descriptions to personal observations of differential erosion and landform development.

• National Curriculum Attainment Targets
• A-Level: Geography - Coastal Landscapes and Change
• A-Level: Geography - Physical Systems and Processes

• 30–45 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Gallery Walk
• 45 min · Small Groups

Modelling: Headland Erosion Trays

Fill trays with layered sand and clay to form headlands. Direct water hoses or droppers to simulate waves, noting cliff retreat, cave formation, arch collapse, and stack isolation. Groups photograph each stage and annotate changes on worksheets.

Analyze the sequence of events leading to the formation of a stack from a headland.

Facilitation Tip

During Headland Erosion Trays, circulate to ensure students vary wave angles and materials to see how refraction focuses energy on headlands rather than bays.

What to look for

Provide students with an image of a coastal headland. Ask them to label at least three erosional landforms visible or implied in the image and write one sentence explaining the primary erosional process responsible for one of the labeled features.

• Understand
• Apply
• Analyze
• Create
• Relationship Skills
• Social Awareness

Activity 02

• Gallery Walk
• 30 min · Pairs

Sequencing: Landform Evolution Cards

Distribute shuffled cards showing diagrammed stages from cliff to stump. Pairs arrange them chronologically, justify links with process explanations, then present to class for peer feedback.

Differentiate between different types of caves and their erosional origins.

Facilitation Tip

For Landform Evolution Cards, ask groups to justify their sequence order by pointing to erosion processes in their model or textbook before finalizing.

What to look for

Present students with a series of diagrams illustrating the stages of arch formation and collapse. Ask them to number the diagrams in the correct sequence and write a brief description of the key erosional event occurring at each stage.

• Understand
• Apply
• Analyze
• Create
• Relationship Skills
• Social Awareness

Activity 03

• Gallery Walk
• 40 min · Individual

Profiling: Wave-Cut Platform Analysis

Provide cross-sectional photos of platforms from UK coasts. Individuals draw profiles, label erosion evidence, and infer past sea levels. Share in small groups to compare interpretations.

Explain how wave-cut platforms provide evidence of past sea levels.

Facilitation Tip

When Profiling Wave-Cut Platforms, have students measure slope angles and platform widths to connect erosion rates with platform preservation over time.

What to look for

Pose the question: 'How does the presence of a wave-cut platform provide evidence for changes in sea level or coastal position over time?' Facilitate a class discussion where students share their reasoning, referencing specific erosional processes and landform characteristics.

• Understand
• Apply
• Analyze
• Create
• Relationship Skills
• Social Awareness

Activity 04

• Concept Mapping
• 35 min · Small Groups

Concept Mapping: Virtual Jurassic Coast Tour

Use Google Earth to explore sites like Old Harry Rocks. Small groups identify and sketch cliffs, arches, stacks, adding labels for formation processes and sea level indicators.

Analyze the sequence of events leading to the formation of a stack from a headland.

Facilitation Tip

On the Virtual Jurassic Coast Tour, pause at each location to ask students to predict the next landform stage based on current erosion evidence.

What to look for

Provide students with an image of a coastal headland. Ask them to label at least three erosional landforms visible or implied in the image and write one sentence explaining the primary erosional process responsible for one of the labeled features.

• Understand
• Analyze
• Create
• Self-Awareness
• Self-Management

A few notes on teaching this unit

Teach this topic by layering physical models with visual timelines and real-world mapping. Avoid rushing through the stages; let students experience the slow, cumulative nature of erosion through repeated trials and observations. Research shows that combining tactile modeling with spatial mapping improves spatial reasoning and process understanding in geomorphology.

Successful learning looks like students explaining how wave refraction targets headlands, tracing cave-to-arch-to-stack evolution through multiple activities, and using platform profiles to infer past coastal changes. Students should connect processes like hydraulic action and abrasion to specific landform features they create or analyze.

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Watch Out for These Misconceptions

• During Headland Erosion Trays, watch for students who assume waves erode all coastlines evenly.

  Redirect their attention to the refraction diagram and have them adjust wave angles in their tray to see energy concentration on headlands, then compare erosion between headland and bay materials.

• During Landform Evolution Cards, watch for students who think arches and stacks form in a single storm.

  Ask groups to build a timeline using the cards, writing estimated durations (centuries) on the back of each card to challenge instant-formation ideas.

• During Profiling Wave-Cut Platforms, watch for students who think wave-cut platforms only show current sea levels.

  Have students measure platform elevation above current sea level and compare it to historical sea level data provided in the activity, prompting discussion about uplift or past lower sea levels.

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Methods used in this brief

• Gallery Walk
• Concept Mapping