Paper Roller Coaster Challenge: Design, Build, and Improve
Materials Needed
- Paper or index cards
- Straws, craft sticks, or cardboard strips
- Tape
- Scissors
- Paper cup or small container
- Marble, pom-pom, or small ball
- Ruler
- Pencil and paper for planning and recording data
- Optional: stopwatch, building blocks, crayons, or a digital drawing tool
Learning Objectives
By the end of the lesson, the learner will be able to:
- Explain how height, gravity, speed, and friction affect a moving object.
- Design and build a paper track that guides a marble or pom-pom from start to finish.
- Measure and record at least three test results.
- Improve a design using evidence from testing.
- Describe one design choice and explain why it helped or created a problem.
Success Criteria
A successful project will:
- Have a clear starting point and ending point.
- Keep the marble or pom-pom on the track for most or all of the journey.
- Include at least one turn, hill, ramp, or loop-like feature.
- Be tested at least three times.
- Include one improvement based on test results.
Introduction: Hook and Objectives
Hook: The Roller Coaster Engineer Challenge
Imagine that an amusement park has asked you to design a brand-new roller coaster. Your coaster must move a marble safely from the top of a ramp into a cup at the end. The park will not accept a design that simply looks exciting—it must actually work!
Ask the learner:
- What makes a roller coaster move?
- Why do roller coasters usually begin with a tall hill?
- What might make a marble slow down or fall off the track?
Tell the learner: “Today you will learn how gravity, speed, and friction affect motion. Then you will use what you learn to design, build, test, and improve your own roller coaster track.”
Key Vocabulary and Talking Points
- Gravity: A force that pulls objects toward Earth. Gravity helps the marble move down a ramp.
- Speed: How quickly an object moves. A steeper or taller ramp may help the marble move faster.
- Friction: A force that happens when surfaces rub together. Friction can slow the marble down.
- Engineering design: A process of planning, building, testing, and improving a solution.
Body: Teach and Practice
Part 1: I Do—Teacher or Adult Demonstration
Use a sheet of paper to make a simple track. Create two raised sides by folding the paper edges upward. Place one end higher than the other and release the marble.
Think aloud:
- “The higher end gives the marble more stored energy.”
- “When I release it, gravity pulls it downhill.”
- “The marble slows when it rubs against the paper or bumps into a bend.”
- “I need to make the track strong enough to hold its shape.”
Quick Check: Ask the learner to point to the highest part of the track and predict where the marble will move fastest.
Part 2: We Do—Plan the Track Together
Work together to sketch a design before building. The design should include:
- A starting point
- An ending cup or container
- At least one hill, turn, or ramp
- Supports to hold the track up
Discuss the following questions:
- Where should the highest point be?
- How will the track stay attached to the table, floor, or books?
- How can we prevent the marble from flying off at a turn?
- What materials will make the track stronger?
Think-Pair-Share Option: If more than one learner is participating, have each learner explain one design idea to a partner before the group chooses a plan.
Part 3: You Do—Build the Roller Coaster
- Use paper, index cards, or cardboard strips to create the track.
- Fold or roll materials to make the track stronger.
- Use tape, cups, books, craft sticks, or blocks as supports.
- Make sure the track is wide enough for the marble or pom-pom.
- Place the cup at the finish line.
- Predict whether the first test will work and explain why.
Safety Reminder: Use scissors carefully and keep small objects away from young children or pets.
Part 4: Test, Record, and Improve
Test the track at least three times. Record the results in a table like the one below.
| Test | What Happened? | Where Did It Stop or Fall? | What Could Be Improved? |
|---|---|---|---|
| 1 | |||
| 2 | |||
| 3 |
After each test, make only one or two changes. Possible improvements include:
- Making a ramp steeper
- Adding support under a weak section
- Smoothing a sharp turn
- Widening the track
- Adding side walls
- Reducing friction by using smoother paper
Formative Assessment Questions:
- What caused the marble to move?
- Where did the marble lose speed?
- What evidence shows that your improvement helped?
- What would happen if the starting point were higher?
Real-World Connection
Engineers use the same process when designing roller coasters, roads, ramps, playground equipment, and machines. They do not expect the first design to be perfect. They test it, study what happened, and make improvements based on evidence.
Choice and Creativity Options
Choose one challenge:
- Speed Challenge: Make the marble reach the cup as quickly as possible.
- Distance Challenge: Build the longest track possible.
- Accuracy Challenge: Make the marble land in the cup three times in a row.
- Theme Challenge: Decorate the track as a space station, jungle adventure, castle, or futuristic city.
- Story Challenge: Write a short story about a marble traveling through your roller coaster.
Differentiation
Support for Learners Who Need Extra Help
- Begin with a straight ramp before adding turns.
- Use a larger pom-pom instead of a small marble.
- Provide a sample track or partially completed track.
- Use a planning template with labeled spaces for start, turn, supports, and finish.
- Allow the learner to explain ideas orally instead of writing full sentences.
Extension for Advanced Learners
- Measure the track’s length and compare it with another design.
- Use a stopwatch to calculate which design is fastest.
- Design two tracks and identify which variables affected performance.
- Calculate the average time from three tests.
- Add a requirement, such as two turns, two hills, or a minimum track length.
Assessment
Formative Assessment
- Listen to the learner’s predictions before testing.
- Check whether the learner uses the words gravity, speed, friction, or force correctly.
- Review the testing table after each trial.
- Ask the learner to explain why a design change was made.
Summative Assessment
The learner will demonstrate the completed track and give a brief explanation of the design.
Use this simple rubric:
| Criteria | Excellent | Developing |
|---|---|---|
| Science Explanation | Clearly explains how gravity, speed, or friction affected the marble. | Gives a partial explanation or needs prompting. |
| Design and Construction | Track is creative, sturdy, and includes the required features. | Track is partly complete or needs additional support. |
| Testing | Completes at least three tests and records observations. | Completes fewer than three tests or records limited observations. |
| Improvement | Makes a change based on test evidence and explains its effect. | Makes a change but cannot yet explain its effect. |
Conclusion: Closure and Recap
Ask the learner to complete these sentences:
- “Gravity helped my marble by…”
- “Friction affected my design when…”
- “My most useful improvement was…”
- “If I built the roller coaster again, I would…”
Tell the learner: “Today you learned that gravity can make an object move downhill, friction can slow it down, and engineers improve designs through testing. You used a plan, built a model, collected evidence, and made an improvement—just like a real engineer.”
Optional Follow-Up Activity
Have the learner create a labeled diagram of the final roller coaster. Include arrows showing the direction of motion and labels for gravity, speed, friction, the starting point, and the finish.