Testing Material Strength

Active learning works because students need to feel the difference between a stable and unstable base, and see how shapes distribute weight. When they test materials with their own hands, abstract concepts like rigidity and load-bearing become concrete and memorable. This hands-on approach builds both understanding and confidence in engineering principles.

• Grade 1
• Science
• 3 activities
• 30 min–40 min

Learning Objectives

1. Classify materials as strong, weak, bendable, or rigid based on observational data from testing.
2. Compare the strength of two different materials, such as paper and cardboard, by designing and conducting a simple test.
3. Explain why certain materials are more suitable than others for building structures that need to withstand force.
4. Identify the properties of materials that make them suitable for specific purposes, like building a bridge.

Simulation Game

⏱ 35 min·Small Groups

Simulation Game: The Great Base Challenge

Groups are given blocks and challenged to build the tallest tower possible. They then repeat the task but must make the base twice as wide, comparing which tower is harder to knock over.

Prepare & details

Explain why some materials break easily while others do not.

Facilitation Tip: During The Great Base Challenge, circulate and ask guiding questions like 'What happens when you move the weights higher?' to help students notice stability changes.

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

Gallery Walk

⏱ 30 min·Pairs

Gallery Walk: Shape Hunt

Students walk around the school or look at photos of famous structures. They use 'viewfinders' (paper frames) to spot and draw triangles, squares, and arches, then share why they think those shapes were used.

Prepare & details

Design a test to compare the strength of paper versus cardboard.

Facilitation Tip: For the Shape Hunt Gallery Walk, prompt students to photograph or sketch at least one natural and one human-made stable shape from their environment.

Setup: Wall space or tables arranged around room perimeter

Materials: Large paper/poster boards, Markers, Sticky notes for feedback

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

Inquiry Circle

⏱ 40 min·Pairs

Inquiry Circle: The Paper Bridge

Pairs try to build a bridge between two books using only one sheet of paper. They experiment with folding the paper (corrugation) to see how changing the shape makes the structure more stable and able to hold weight.

Prepare & details

Evaluate which material would be best for building a strong bridge.

Facilitation Tip: In The Paper Bridge task, demonstrate how to fold edges upward to create stiffeners before letting students build, modeling the engineering design process.

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

Teach this topic by having students compare and contrast rather than memorize. Avoid telling them which shapes are strongest; instead, let them test and discuss failures. Research shows that children learn material properties best when they experience both success and collapse in a low-stakes setting. Keep the focus on the relationship between form and function, and avoid overemphasizing weight as a sole indicator of strength.

What to Expect

Successful learning looks like students explaining why a wide base matters, selecting materials not just by weight but by how they connect, and making connections between shapes they test and structures they see in their community. They should also be able to predict which structures will hold more weight before testing.

Watch Out for These Misconceptions

Common Misconception

During The Great Base Challenge, watch for students who assume taller towers are always less stable.

What to Teach Instead

Have them add a heavy base to a tall tower and test it against a short, top-heavy tower. Let them observe that stability depends on the distribution of mass, not just height.

Common Misconception

During The Paper Bridge, watch for students who select materials based solely on thickness or weight.

What to Teach Instead

Ask them to test how a single sheet of paper holds weight when folded into different shapes, showing that connection methods matter more than material bulk.

Assessment Ideas

Exit Ticket

After The Great Base Challenge, give each student a small object (e.g., a popsicle stick, a piece of cardboard). Ask them to write whether the object is strong, weak, bendable, or rigid, and explain their choice based on how it performed when they tested it as part of the base.

Quick Check

During the Shape Hunt Gallery Walk, ask students to hold up their chosen objects and explain which they think is most rigid. Listen for students to describe material properties like stiffness and how that affects stability.

Discussion Prompt

After The Paper Bridge, pose the question: 'If your bridge collapsed, what do you think failed first? The joints, the materials, or the shape?' Listen for students to connect the failure point to how they connected or shaped their materials.

Extensions & Scaffolding

• Challenge: Ask students to design a bridge using only newspaper and tape that can hold a small toy car, then test it and refine their design based on failure points.
• Scaffolding: Provide pre-cut cardboard strips and glue for students who struggle with precision in The Paper Bridge, so they can focus on joint strength rather than construction.
• Deeper exploration: Have students research and build a model of a traditional Indigenous dwelling, explaining how its shape and materials contribute to stability and comfort.

Key Vocabulary

Strong	A material that can resist bending, breaking, or deforming when a force is applied to it.
Weak	A material that breaks or bends easily when a force is applied to it.
Bendable	A material that can be shaped or curved without breaking.
Rigid	A material that is stiff and does not bend or change shape easily.