Toothpick Bridge Engineering Challenge
Created byDustin Foster
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Toothpick Bridge Engineering Challenge

Grade 9ScienceMath4 days
The Toothpick Bridge Engineering Challenge for 9th-grade students integrates science and math to design and build model bridges. The project revolves around students applying engineering principles, physics, and geometry to create functional toothpick bridges while considering real-world constraints like material properties and geometric design. Through guided inquiry activities, students engage in sketching, designing, testing, and iterative improvement, culminating in a final model tested for strength and resilience. This immersive experience challenges students to integrate theoretical knowledge with practical application, enhancing problem-solving, design, and critical thinking skills.
EngineeringDesignPhysicsMathematicsBridgesGeometryProblem-Solving
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Inquiry Framework

Question Framework

Driving Question

The overarching question that guides the entire project.How can we, as engineers, design and build a functional toothpick bridge that meets the needs of a city, considering the principles of physics and mathematics, types of bridges, and material properties?

Essential Questions

Supporting questions that break down major concepts.
  • Why are bridges important in urban planning and development?
  • What factors must an engineer consider when designing a bridge?
  • How can the principles of physics and mathematics be applied to model and construct a bridge?
  • What are the different types of bridges and what are their specific uses and limitations?
  • How do material properties influence the design and functionality of a bridge?

Standards & Learning Goals

Learning Goals

By the end of this project, students will be able to:
  • Students will understand and apply the principles of physics to design and construct a functional bridge using toothpicks.
  • Students will be able to analyze different types of bridges, understanding their uses, strengths, and limitations.
  • Students will develop problem-solving skills by tackling complex engineering challenges and breaking them down into manageable tasks.
  • Students will learn to communicate their design process and reasoning, using scientific and mathematical terminology accurately.
  • Students will evaluate material properties and their impact on structural design, ensuring their bridge can meet specific needs.

Next Generation Science Standards

HS-ETS1-2
Primary
Design a solution to a complex real-world problem by breaking it down into smaller, more manageable problems that can be solved through engineering.Reason: Students will be applying engineering principles to design a toothpick bridge, which involves breaking down the complex task into manageable parts.
HS-PS2-6
Secondary
Communicate scientific and technical information about why the molecular-level structure is important in the functioning of designed materials.Reason: Understanding the properties of materials like toothpicks helps students design a bridge that is functional and efficient.

Common Core Standards

CCSS.MATH.CONTENT.HSG.MG.A.1
Primary
Use geometric shapes, their measures, and their properties to describe objects.Reason: Students will use geometric shapes and properties while constructing their bridge models, crucial for understanding design limitations.
CCSS.MATH.CONTENT.HSA.CED.A.3
Secondary
Represent constraints by equations or inequalities, and by systems of equations and/or inequalities, and interpret solutions as viable or non-viable options in a modeling context.Reason: Students need to consider constraints in the design and construction of their bridges, interpreting which solutions are viable.

Entry Events

Events that will be used to introduce the project to students

Bridge Collapse Mystery

Present students with a real-world scenario where a bridge has mysteriously collapsed in a nearby city, causing widespread disruption. Task them with investigating potential design flaws using toothpick models to prevent future incidents, compelling them to dive into engineering and physics principles right from the start.

Survivor: Engineering Edition

Create an 'Engineering Survivor' competition where student teams compete to build the strongest toothpick bridge. Introduce unexpected "natural disaster" challenges that their bridges must endure, fostering problem-solving and adaptive thinking.

Virtual Reality Bridge Tour

Kick off the project with an immersive virtual reality tour of famous bridges around the world, highlighting their diverse designs and the math and science principles that underpin them. This experience ignites curiosity and grounds students in the relevance of their forthcoming task.
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Portfolio Activities

Portfolio Activities

These activities progressively build towards your learning goals, with each submission contributing to the student's final portfolio.
Activity 1

Brainstorming Bridge Basics

Students will explore basic bridge design principles and initiate their toothpick bridge models by brainstorming and sketching different types of bridges. This begins their understanding of bridge functionality and the importance of different designs.

Steps

Here is some basic scaffolding to help students complete the activity.
1. Research different types of bridges and their uses, strengths, and limitations.
2. Brainstorm and list what makes bridges important for cities.
3. Sketch at least three different bridge designs using toothpicks as a medium.
4. Discuss with peers to refine design choices for the final model.

Final Product

What students will submit as the final product of the activityStudents will create a booklet of bridge sketches and ideas, outlining their initialization of the project.

Alignment

How this activity aligns with the learning objectives & standardsHS-ETS1-2: Breaking down the project into design sketches that explore manageable design ideas; understanding concepts before construction.
Activity 2

Physics in Design

Students apply physics principles to their chosen bridge design to ensure stability and functionality, considering factors such as weight distribution and tension.

Steps

Here is some basic scaffolding to help students complete the activity.
1. Select a finalized bridge design from the brainstorming session.
2. Identify basic physics principles that apply to your bridge design (e.g., tensile strength, weight distribution).
3. Use toothpicks to build a small-scale section of the bridge frame to test physics concepts.
4. Analyze the test results and write a short report on how physics applies to your specific bridge design.

Final Product

What students will submit as the final product of the activityA test framework model with a physics analysis report.

Alignment

How this activity aligns with the learning objectives & standardsHS-PS2-6: Communicate scientific information about molecular structure in relation to force distribution.
Activity 3

Geometric Solutions to Constraints

Students detail their bridge design using geometric principles, applying math concepts to address potential design constraints such as size limits and weight bearing.

Steps

Here is some basic scaffolding to help students complete the activity.
1. Discuss potential design constraints, considering geometric shapes and properties.
2. Draft blueprints incorporating geometric shapes, using exact measurements.
3. Calculate load factors and potential pressure points on the bridge.
4. Revise design plans based on geometric analysis to ensure the model will withstand forces.

Final Product

What students will submit as the final product of the activityComprehensive blueprint with geometric justifications for design choices.

Alignment

How this activity aligns with the learning objectives & standardsCCSS.MATH.CONTENT.HSG.MG.A.1: Use geometric shapes and properties in design.
Activity 4

Building and Testing

Students build their final bridge, considering all factors and information gathered in previous activities, and conduct tests to see how their models fare against various challenges, including weight and "natural disaster" scenarios.

Steps

Here is some basic scaffolding to help students complete the activity.
1. Begin building the complete bridge model using toothpicks, adhering to the final blueprint.
2. Test the bridge for weight capacity and structural integrity.
3. Simulate natural disaster scenarios to assess responsiveness to stress.
4. Record the results and reflect on performance against initial design goals.

Final Product

What students will submit as the final product of the activityA fully constructed toothpick bridge model with a performance report.

Alignment

How this activity aligns with the learning objectives & standardsHS-ETS1-2, CCSS.MATH.CONTENT.HSA.CED.A.3: Apply engineering principles and constraints in building and testing.
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Rubric & Reflection

Portfolio Rubric

Grading criteria for assessing the overall project portfolio

Toothpick Bridge Design and Construction Rubric

Category 1

Research and Design Planning

Evaluates student's ability to explore different bridge designs, understand their importance, and plan their construction using sketches and analyses.
Criterion 1

Bridge Design Sketching

Assesses the student's ability to create detailed and diverse bridge design sketches reflecting understanding of different bridge types and their functions.

Exemplary
4 Points

Produces highly detailed and accurate sketches of multiple bridge designs, demonstrating a deep understanding of design principles and creativity in approach.

Proficient
3 Points

Creates detailed sketches of several bridge designs, reflecting a solid understanding of design principles with minor errors.

Developing
2 Points

Produces basic sketches of some bridge designs, showing partial understanding and needing further refinement.

Beginning
1 Points

Sketches lack detail and fail to demonstrate understanding of bridge design principles.

Criterion 2

Design Justification

Measures the student's ability to justify their design choices based on research and expected functionality.

Exemplary
4 Points

Thoroughly justifies design choices using evidence from research and explains expected functionality with exceptional depth.

Proficient
3 Points

Provides a clear justification for design choices using evidence from research and explains functionality adequately.

Developing
2 Points

Offers some justification for design choices, but lacks clarity and comprehensive evidence.

Beginning
1 Points

Fails to justify design choices or rely on research evidence.

Category 2

Application of Physics

Assesses the student's application of physics principles to their bridge design, focusing on understanding and testing concepts such as tension, force distribution, and material properties.
Criterion 1

Physics Principles Integration

Evaluates how well the student applies physics principles to bridge design and construction.

Exemplary
4 Points

Demonstrates exceptional integration of physics principles in design, showing sophisticated understanding of tension, force distribution, and material properties.

Proficient
3 Points

Effectively applies physics principles with a clear understanding of their impact on the design.

Developing
2 Points

Shows basic integration of physics principles, but with gaps in understanding.

Beginning
1 Points

Struggles to apply physics principles accurately in design.

Criterion 2

Testing and Analysis

Assesses the ability to conduct experiments and analyze data related to the physics of bridge construction.

Exemplary
4 Points

Conducts thorough experiments and provides in-depth analysis, showing an exceptional grasp of the physics involved.

Proficient
3 Points

Conducts experiments methodically and provides clear analysis, demonstrating a solid understanding.

Developing
2 Points

Performs basic experiments with some analysis, showing limited understanding.

Beginning
1 Points

Experiments are incomplete or lack analysis, showing minimal understanding.

Category 3

Mathematical Geometry and Constraints

Evaluates the student's use of geometric principles and constraints in designing a functional bridge.
Criterion 1

Geometric Application

Assesses student's ability to apply geometric shapes and properties in bridge design accurately.

Exemplary
4 Points

Integrates geometric shapes and properties effectively, optimizing design using advanced mathematical reasoning.

Proficient
3 Points

Applies geometric principles correctly, with clear reasoning behind design decisions.

Developing
2 Points

Uses geometric principles to a basic degree, with some errors or misunderstandings.

Beginning
1 Points

Minimal integration of geometric principles, lacking accuracy or understanding.

Criterion 2

Constraints and Calculations

Measures the ability to incorporate constraints and perform calculations to ensure design viability.

Exemplary
4 Points

Incorporates constraints effectively, performs accurate calculations, and clearly interprets results, ensuring optimal design performance.

Proficient
3 Points

Addresses constraints and performs calculations accurately, demonstrating functional understanding.

Developing
2 Points

Identifies some constraints and performs basic calculations, but with errors impacting design.

Beginning
1 Points

Limited ability to identify constraints or perform accurate calculations.

Category 4

Construction and Evaluation

Assesses student's proficiency in constructing the bridge model and evaluating its performance against expectations.
Criterion 1

Model Construction

Evaluates the accuracy and craftsmanship in the construction of the toothpick bridge model.

Exemplary
4 Points

Constructs a highly accurate and well-crafted model, demonstrating meticulous attention to detail.

Proficient
3 Points

Builds an accurate model, reflecting careful work and adherence to design.

Developing
2 Points

Produces a basic model with limited craft quality and some design adherence.

Beginning
1 Points

Model construction is lacking in accuracy and craftsmanship, with significant issues.

Criterion 2

Performance Evaluation

Assesses the student's ability to evaluate the bridge's performance and reflect on design improvements.

Exemplary
4 Points

Provides comprehensive performance evaluation with insightful reflections and significant design improvement suggestions.

Proficient
3 Points

Offers a detailed performance evaluation with useful reflections on improvement.

Developing
2 Points

Provides a basic performance evaluation with limited reflection on improvements.

Beginning
1 Points

Performance evaluation lacks detail and reflection, unable to suggest improvements.

Reflection Prompts

End-of-project reflection questions to get students to think about their learning
Question 1

Reflect on how your understanding of engineering principles evolved throughout the process of designing and building your toothpick bridge. What were some of the key lessons learned?

Text
Required
Question 2

On a scale from 1 to 5, how challenging did you find the task of applying physics and mathematics to design a functional bridge?

Scale
Required
Question 3

Which aspect of the bridge project did you find most engaging and why?

Text
Required
Question 4

Consider the feedback provided by peers during the design discussions. How did this influence your final design and model?

Text
Required
Question 5

Looking back at the project, how would you approach the task differently if you were to start over? What new strategies would you employ?

Text
Optional
Question 6

Were the geometric and physics principles you learned effective in solving the design constraints of your bridge?

Multiple choice
Required
Options
Yes, they were effective in solving most challenges.
Somewhat, they helped with some aspects, but not all.
No, they didn't significantly aid in overcoming design constraints.