Powerstation Mini Systems

Overview

In this 180-minute session, Year 8 students will explore the design and function of subsystems in the Huntly Power Station. They will create mini subsystems and link their designs to form a scale model with working parts. This hands-on project will develop technological literacy, design thinking, and collaborative skills aligned with the New Zealand Curriculum Refresh.

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WALT (We Are Learning To)

• Understand and analyse how subsystems operate within a larger system (the Huntly Power Station).
• Design and create mini subsystems with working parts.
• Collaborate to connect mini subsystems into a complete system model.
• Use design thinking and problem-solving skills to improve subsystem functionality.

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Learning Objectives

This lesson aligns with the Technology learning area of the New Zealand Curriculum Refresh:

• Technological Practice:

• Use design ideas and prototyping techniques to develop outcomes.

• Demonstrate understanding of how different subsystems connect to form a complete system.

• Technological Knowledge:

• Understand the principles of energy transformation and power generation systems.

• Investigate how subsystems contribute to an overall system's performance.

• Nature of Technology:

• Explore how technological outcomes respond to needs and opportunities in society.

• Key Competencies:

• Thinking — applying design, problem-solving and critical thinking.

• Relating to others — collaboration while building the model.

• Using language, symbols, and texts — interpreting subsystem diagrams and technical information.

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Materials and Resources

• Diagrams and photos of the Huntly Power Station subsystems.
• Cardboard, craft materials, simple electrical components (motors, switches, batteries).
• Tools: scissors, glue, tape, wire strippers.
• Worksheets for planning subsystem designs.
• Large surface or board for assembly of the combined scale model.

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Lesson Plan

Time	Activity	Details and Teacher Role
0-15 mins	Introduction	Present an overview of Huntly Power Station and its key subsystems (turbine, generator, water flow system, cooling system). Use visuals to engage students. Discuss the roles of each subsystem within the power station system.
15-30 mins	Discussion of Subsystems	Whole class discussion: How do subsystems link? Introduce the concept of inputs, processes, and outputs. Record key points on whiteboard. Establish success criteria for mini designs.
30-50 mins	Subsystem Design Plan	Students individually or in pairs choose a subsystem to design. Use worksheets to sketch and label their mini subsystem, specifying its function and parts. Teacher circulates, supporting target learners.
50-100 mins	Subsystem Construction	Students create mini subsystems using craft materials and basic electrical components where applicable. Encourage problem-solving as they build moving or working parts. Teacher to facilitate, ensuring safety and providing aids where needed.
100-120 mins	Break	Short break for students.
120-150 mins	Linking Subsystems	Students bring their mini subsystems together to connect into a linked scale model. Discuss how their subsystems interact. Troubleshoot connection issues as a class. Teacher guides reflection on system function and cohesion.
150-175 mins	Testing and Adjustments	Test the working model with moving parts. Encourage iterative improvements, focusing on system reliability and flow. Students document any design changes made.
175-180 mins	Reflection and Review	Whole class discussion — What worked well? What was challenging? What did you learn about subsystems? Students complete a quick exit ticket reflecting on success criteria.

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Success Criteria

Students will:

• Clearly explain the function of their chosen subsystem in the power station context.
• Produce a labelled design plan showing key parts and how their subsystem works.
• Successfully construct a mini subsystem with at least one moving or working part.
• Collaborate with peers to link subsystems into a functioning scale model.
• Reflect thoughtfully on the design and the system as a whole.

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Extension Activities

For advanced learners or early finishers:

• Research an additional subsystem used in power generation not covered in the Huntly example and design a mini model for it.
• Create a presentation or poster explaining how the whole power station works, including energy transformations.
• Use simple coding platforms (such as micro:bit if available) to automate parts of their subsystem or model with sensors or controls.
• Investigate and propose improvements for efficiency or environmental impact of the Huntly Power Station subsystems.

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Teaching Tips and Differentiation

• Scaffold design tasks with template worksheets for students who need support.
• Provide extra technical help and material suggestions for target learners.
• Use questioning strategies to deepen critical thinking about system interactions.
• Encourage collaboration and peer support to build confidence and communication skills.

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This lesson plan embraces the New Zealand Curriculum Refresh’s emphasis on hands-on technological practice, knowledge, and the nature of technology. It draws on authentic local context, evoking curiosity and ownership over the learning. The subsystems project fosters creativity, critical thinking, collaboration and problem-solving skills essential for 21st-century learners.