Exploring 3D Printing

Grade Level

2nd Grade

Duration

45 minutes

Class Size

25 students

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Learning Objectives (Aligned with Common Core State Standards)

By the end of this lesson, students will be able to:

• Identify and explain what 3D printing is as a way to create objects by layering materials.
• Describe simple uses of 3D printing in everyday life (toys, tools, art).
• Create a basic 3D shape design using child-friendly software or hands-on modeling tools.
• Understand basic safety rules when working near 3D printers.

Common Core Standards Addressed

• CCSS.MATH.CONTENT.2.G.A.1: Recognize and draw shapes having specified attributes, such as a given number of angles or equal faces. (Geometry)
• CCSS.ELA-LITERACY.SL.2.4: Tell a story or recount an experience with appropriate facts and relevant descriptive details. (Speak and Listen)
• CCSS.ELA-LITERACY.W.2.2: Write informative/explanatory texts to examine a topic and convey ideas clearly. (Writing - Optional Extension)
• NGSS 2-PS1-1: Plan and conduct an investigation to describe and classify different kinds of materials by their observable properties.

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Materials Needed

• 3D printer (ideally one printer for small groups or demonstration)
• Child-friendly 3D modeling software (tablet/computer loaded with simple shape-design apps like Tinkercad's basic tools or offline drawing apps)
• Modeling clay or playdough for hands-on shape making (optional for tactile experience)
• Printed or digital images of 3D printed objects (toys, tools, household items)
• Safety goggles (for demonstration near the 3D printer)
• Projector or large screen for instruction
• Whiteboard and markers

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Safety Guidelines

• Students do NOT touch the 3D printer unless supervised.
• Always wear safety goggles while near the 3D printer.
• Keep hair tied back, and avoid loose clothing near the printer.
• Remind students to use gentle hands when creating their shapes.
• Only trained adults operate the 3D printer.

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Lesson Breakdown

1. Introduction to 3D Printing (10 minutes)

• Engage: Show pictures/videos of 3D printed items (e.g., a small toy, keychain, or model car). Ask: "Have you ever seen something like this? How do you think it was made?"
• Explain: Introduce the concept of 3D printing: a machine that makes objects by stacking layers, kind of like building with blocks.
• Relate: Brief talk on how 3D printing can help us make toys, tools, or even things to help in space or hospitals.

2. Shape Exploration and Design (15 minutes)

• Group Activity: Divide class into small groups with tablets/computers or modeling clay.
• Digital Design Option: Using a simple app, guide students in creating basic shapes (cube, pyramid, or cylinder) by arranging blocks.
• Hands-On Option: Students build a model shape with clay/playdough to understand 3D form.
• Encourage students to describe their shape using terms like faces, edges, and corners.

3. Demonstration of Printing (10 minutes)

• Show the 3D printer in action (live or video) printing a simple shape like a cube.
• Explain the layering process: how it adds one layer at a time until the shape is finished.
• Reiterate safety rules during printing.

4. Class Discussion and Reflection (5 minutes)

• Each group/student shares one thing they learned or found interesting about 3D printing.
• Ask reflective questions:
  • What kind of things would you like to make with a 3D printer?
  • How might 3D printing help people in the world?

5. Assessment and Wrap-Up (5 minutes)

• Quick oral quiz:
  • What does a 3D printer do?
  • Name one thing you could make with a 3D printer.
• Collect simple drawings or notes from students illustrating one 3D shape they designed.
• Explain that next time, the printed shapes will be ready to see up close.

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Differentiation

• For students needing extra support: Use hands-on clay models to reinforce the idea of 3D shapes.
• For advanced students: Encourage designing a combination of shapes or explain how 3D printers use steps and measurements.
• Visual aids and simple step-by-step instructions provided on tablets or whiteboard.

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Extensions (Optional)

• Writing Prompt (CCSS.W.2.2): Write 2-3 sentences about what they would create with a 3D printer and why.
• Math Connection (CCSS.MATH.CONTENT.2.G.A.1): Identify and label the shapes they created focusing on attributes.
• Visit or virtual tour of a local makerspace or library with a 3D printer.

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Teacher's Notes

• Emphasize hands-on learning and curiosity.
• Limit screen time, balancing digital with tactile activities.
• Reinforce language skills by having students explain their designs to peers.
• Monitor safety closely around the printer.
• Prepare printer beforehand to minimize wait time during class.

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Thank you for inspiring young creators and future innovators!