For teachers
Engineering standards
This shows how the lesson connects to the national NGSS engineering standards and what student work you can collect.
Assessed
3-5-ETS1-1
Teams define the user or purpose and set measurable size, performance, material, and print-time limits before modeling.
What students show: Problem statement, criteria, constraints, measurements, and labeled sketch.Practiced
3-5-ETS1-2
Students sketch and compare at least two possible forms before choosing or combining features for the digital model.
What students show: Two ideas and a criteria-based design choice.Assessed
3-5-ETS1-3
Teams use a repeatable test—assemble the same organizer, load it with classroom tools, move it one meter, rearrange it, and repeat—identify a failure point, revise one dimension or feature, and retest.
What students show: Test data, version comparison, and evidence-based explanation.Materials
- Corrugated cardboard and recycled plastic-sheet samples
- Calipers
- Classroom tools and load-test tray
- Rulers or calipers
- Graph paper, pencils, cardboard, clay, and tape for prototypes
- Computer or tablet with educator-managed Tinkercad access
- PLA filament; teacher sets a project-specific gram and print-time budget
- Finished test objects appropriate to the lesson
Teacher preparation
- Create an educator-managed Tinkercad class and assignment link; students do not enter personal information.
- Prepare one navigation demonstration using drag, zoom, orbit, undo, and view cube.
- Set the build envelope, minimum wall thickness, minimum feature size, and maximum print time for the class.
- Create the file rule G5_55_Team##_v1.
- Prepare shared build plates and an adult review queue for dimensions, orientation, stability, material use, and safe slicing.
Step by step
How to teach it
Day 1 · 0–20
Define and measure
- Introduce the mission: Design a family of printed connectors that lets users turn flat classroom materials into a sturdy, rearrangeable organizer.
- Identify the user, criteria, constraints, and measurements that matter.
- Sketch two different solutions at approximately full size.
Day 1 · 20–60
Prototype and compare
- Build quick cardboard or clay versions.
- Compare both ideas against the shared criteria.
- Select or combine features and predict the likely failure point.
Day 2 · 0–15
Tinkercad skill warm-up
- Measure several cardboard samples and choose a documented design thickness.
- Model one slot, duplicate it, and align slots into corner or edge connectors.
- Print a small tolerance comb before the full connector family.
Day 2 · 15–60
Build the digital model
- Place the ruler and enter important dimensions instead of guessing.
- Use align and group to create clean, intentional geometry.
- Inspect from top, front, side, and underneath; name the file correctly and submit for teacher review.
Day 3
Print, test, and improve
- An adult slices, approves, operates printers, and removes parts.
- Use the same test procedure each time: assemble the same organizer, load it with classroom tools, move it one meter, rearrange it, and repeat.
- Revise one dimension or feature in a new Tinkercad version and explain the expected improvement.
Assessment
- Problem includes a user or purpose plus measurable criteria and constraints.
- Two sketches show meaningfully different solutions.
- Tinkercad model uses entered dimensions and purposeful tool choices.
- Model meets the teacher's printability and material-budget checklist.
- Test is repeatable and the revision responds to evidence.
Supports & extensions
- Provide a Tinkercad picture guide and a starter file containing only basic reference shapes.
- Use mouse practice, larger grid snap, and one new tool at a time.
- Allow a student to direct a partner or teacher who performs fine cursor movements.
- Offer measured template objects while preserving choices about form and features.
- Extension: reduce material, add a moving fit, or create two size variants using parameters recorded on paper.
Safety & responsible use
- Students do not touch hot ends, heated beds, or moving printer parts.
- An adult handles slicing approval, printer setup, monitoring, part removal, and support cleanup.
- Use only lab-approved PLA and teacher-managed accounts; never publish student names or designs publicly without permission.
- Check finished parts for sharp strings, weak points, and small-piece hazards before use.
- Printed parts are prototypes—not food-safe, medical, climbing, load-bearing, or life-safety products.
No-machine alternative
Build the final version with cardboard, clay, foam, paper tubes, reusable construction pieces, or teacher-prepared shapes. Keep the same measurements, criteria, fair test, evidence, and revision cycle.
Printable student design brief
The challenge
Design a family of printed connectors that lets users turn flat classroom materials into a sturdy, rearrangeable organizer.
Success criteria
- Connectors fit without damaging panels
- Loaded organizer remains stable
- System can be rearranged and reused
Constraints
- Works with teacher-approved flat materials
- Includes at least two compatible connector types
- Uses the tolerance test before full printing
Engineer’s notes
Our user needs…
The measurements that matter are…
Idea A and Idea B are different because…
In Tinkercad we used…
Our test showed…
We changed… because…
Our next version would…