Emergency Substitute Lesson • IED

Design a Better Backpack

Design a practical backpack improvement for a specific student user.

45–60 minutesIndividual workNo prior knowledge requiredNo specialized equipment

Engineering Challenge

Backpacks carry books, devices, water bottles, lunch, and personal items, but they can be uncomfortable, disorganized, or difficult to use. Your job is to design an improved backpack for a specific student.

Design goal: Develop a backpack concept that is useful, realistic, and clearly communicates how it solves the user's problems.

1. Understand the User

Choose one user:

  • A student who walks or bikes to school
  • A student who carries a laptop and several large books
  • A student involved in sports or after-school activities
  • A student who needs quick access to medical or personal items

What problems might this user experience?

2. Define Requirements

Write at least four criteria (features the design should have) and three constraints (limits the design must follow).

CriteriaConstraints

3. Generate Ideas

Create three small concept sketches. Label important features. Each concept should solve the problem in a different way.

Concept 1Concept 2Concept 3

4. Select the Best Concept

Score each concept from 1 (poor) to 5 (excellent).

CriterionConcept 1Concept 2Concept 3
Comfort
Organization
Durability
Ease of use
Total

5. Final Design

Create one large, labeled final sketch. Include the front, side, or interior view needed to communicate the design.

6. Engineering Recommendation

Explain who the design is for, the problem it solves, and how at least three features meet the criteria and constraints.

Submission Checklist

  • All analysis questions are answered.
  • Required calculations, tables, sketches, or diagrams are complete.
  • The final recommendation uses evidence from the lesson.
  • Your name, class period, and date are included.

Closing Reflection

What was the most important engineering or manufacturing decision you made in this lesson? Explain why it mattered.