Iteration and Improvements

Overview

In this 30-minute lesson for Year 1 students, learners will collaborate to improve their boat designs based on testing results. The focus is on understanding iteration as a process of making changes to enhance safety. Students will engage in hands-on activities, discussion, and reflection aligned with the New Zealand Curriculum Refresh for Technology at Level 1.

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Curriculum Links

Technology Learning Area - Level 1:

• Technological Practice:

• Develop simple plans to communicate ideas.

• Use materials, components, and tools safely.

• Progress Outcome: Students use prior testing to improve their designs and explain their choices.

• Technological Knowledge:

• Recognise how materials, tools, and equipment can be used in designing.

• Understand simple cause-and-effect relationships (e.g., how changes improve safety).

• Nature of Technology:

• Understand that designing and developing technology involves iterative cycles of planning, creating, testing, and improving.

Key Competencies:

• Participating and contributing through collaborative design improvements.
• Thinking by reflecting on the effectiveness of design changes.
• Using language, symbols, and texts to communicate ideas and reasons for changes.

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Learning Objectives

By the end of this lesson, students will:

1. Understand the meaning of iteration — making changes to a design based on testing.
2. Collaborate with peers to suggest and make improvements to their boats.
3. Identify and share how design changes might improve safety.
4. Communicate their ideas clearly and listen respectfully to others.

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Materials Needed

• Previously built boats from earlier lessons.
• Containers for water testing (small tubs or basins).
• Materials for making improvements (e.g., tape, straws, paper, foil, glue, scissors).
• Chart paper and markers for group discussion.
• Safety goggles (optional for safe use of tools).

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Lesson Breakdown

1. Introduction and Review (5 minutes)

• Gather students in a circle to revisit the boats they created and tested previously.
• Briefly discuss what happened during the last test: Did the boats float? Did they tip over? What problems did they notice?
• Explain the word iteration: “When something doesn’t work perfectly, we can make it better by changing and testing again. This is called iteration.”

Teaching Tip: Use simple, clear language and visual prompts.

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2. Collaborative Improvement Activity (15 minutes)

• Group Work: Divide students into small groups of 3 (5 groups for 15 students).
• Each group receives their boat and testing container.
• Ask: “What can we change on our boat to make it safer so it doesn’t tip over or sink?”
• Children discuss and decide as a group what changes to try.
• Provide materials for them to add or change parts of the boat.
• After changes, test the boats again in water.
• Encourage students to observe what happens carefully.

Teaching Support: Circulate among groups, prompting questions such as "Why did you decide to add that?" or "How do you think this change helps?"

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3. Sharing and Reflection (7 minutes)

• Come together as a whole class.
• Ask each group to share:
• What changes they made.
• Why they think the changes will help make the boat safer.
• What they noticed when they tested again.
• Record main ideas on chart paper, using simple language and pictures if possible.
• Highlight the idea that making changes helps us learn and improve our designs.

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4. Closing and Next Steps (3 minutes)

• Summarise the lesson purpose: “Testing helps us find out if our boats are safe. Changing what doesn’t work is how we improve.”
• Praise curiosity, teamwork, and effort.
• Let students know that next time they will continue to improve or make new designs.
• Encourage children to think about what they’d like their next design to look like.

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Assessment and Feedback

• Formative Assessment:
• Observe participation in discussions and activities.
• Listen for understanding of iteration during sharing.
• Note ability to communicate reasons for changes.
• Feedback: Provide encouraging, specific feedback praising students’ problem-solving and collaboration.
• Involve peer feedback by having groups ask each other questions respectfully.

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Teaching and Learning Strategies

• Use collaborative learning to develop social and communication skills.
• Apply hands-on, sensory learning appropriate for the developmental stage of Year 1 students.
• Encourage iterative thinking consistent with the Technology curriculum’s emphasis on design cycles.
• Use scaffolded questioning to guide reasoning.
• Support all learners by offering materials and ideas that match their abilities and interests.

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Notes for Teachers

• Maintain a positive, supportive atmosphere where trial and error is welcomed.
• Ensure all students have equitable access to materials and the opportunity to participate.
• Manage time carefully to keep students focused during each activity segment.
• Connect learning briefly to everyday items and experiences, like boats seen on trips or on TV, to increase relevance.

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This lesson aligns closely with the New Zealand Curriculum Refresh’s vision for technologically literate learners beginning to use iteration and testing in their design processes. The approach fosters early understanding of safety considerations in design, teamwork, and reflective thinking adapted to Year 1 learners’ capabilities and language level.