Engineers begin by naming the need, the user, and what success should look like.
📋 NGSS Standard: 3-5-ETS1-1 — Define a simple design problem reflecting a need or a want that includes specified criteria for success and constraints on materials, time, or cost.
🎯 Learning Objective
Students will define a grade-appropriate design problem by naming the user, the need, and clear success criteria for a fragile-object protection challenge.
💡 The Big Idea
A strong design starts before building. Engineers first decide who needs help, what problem needs to be solved, and what a successful solution must do.
🔬 The Science
Science Snapshot
Specific design problems lead to better plans, better tests, and clearer evidence.
What is happening?
Engineers begin by naming the need, the user, and what success must look like. In this unit, a fragile-object protection challenge becomes stronger when students clearly say what must be protected and under what test conditions.
Why it works that way
A design problem needs criteria for success and constraints such as materials, time, or drop height. If those pieces are vague, later designs cannot be compared fairly because nobody agrees on what counts as success.
Look for this in the lesson
Students should focus on writing a precise problem statement before thinking about fancy builds. The clarity of the problem is what gives the whole unit structure.
Ask while you read: What exactly must the design do, and what limits must students respect?
Materials
🏠 Household Items to Gather
Printed lesson pages and worksheet
Pencil and colored pencils
Optional: an egg, toy figure, or small fragile stand-in to discuss
Optional: a box or basket of example household materials
📋 Printables
Student Worksheet page from this lesson
Let's Get Started
Step 1 — Launch the Challenge: Introduce the unit challenge: design something that protects a fragile object during a drop from table height.
Step 2 — Name the User and Need: Discuss who or what needs help in the challenge and what the design must prevent.
Step 3 — Create Criteria for Success: Generate clear success goals such as staying unbroken, holding the object in place, and working with allowed materials.
Step 4 — Compare Weak and Strong Problem Statements: Model why “make something cool” is weak but “protect a fragile object during a drop” is strong.
Step 5 — Write a Problem Statement: Students write a problem statement using the challenge user, need, and success criteria.
Discussion Questions
Why do engineers define the problem before building?Look for answers like: They need to know what they are trying to solve and what success should look like.
What makes this challenge more specific than “build something cool”?Look for answers like: It names the fragile object, the drop test, and the success goal.
Why is the word fragile important in this challenge?Look for answers like: It tells why protection matters and what the design must prevent.
How do criteria help engineers?Look for answers like: Criteria tell what the design must do in order to succeed.
Why is it useful to say who or what needs help?Look for answers like: It keeps the design focused on the real need instead of random ideas.
Extensions
Extension: Look around your home and name one other fragile item that might need protection during a move or fall.
Extension: Ask a family member to help rewrite your problem statement so it sounds even more specific.
Parent/Teacher Notes
Teaching note: Students often jump to building ideas. Pause them and bring them back to the problem statement first.
Teaching note: Keep the language concrete: table height, fragile object, limited materials, protected on landing.
The object that needs protection is ________________________________________.
The problem is _________________________________________________________.
2️⃣ What Must the Design Do?
Success criterion
Why it matters
3️⃣ Write a Strong Problem Statement
Use this frame: I need to design something that helps __________ by __________ so the fragile object can __________.
✂️ PARENT ANSWER KEY — Detach before giving worksheet to students
1️⃣ Name the Challenge — Sample Use
Accept answers such as protecting an egg, toy, or other fragile item during a drop from table height.
2️⃣ What Must the Design Do? — Sample Ideas
Strong criteria may include keeping the object from cracking, holding it in place, and working with only the allowed materials.
3️⃣ Write a Strong Problem Statement — Model Response
“I need to design something that helps protect a fragile egg by cushioning the landing so the egg can stay unbroken after a drop.”
✅ What Success Looks Like
Student names the fragile-object challenge clearly.
Student lists at least two useful success criteria.
Student writes a problem statement that includes the need and success goal.
🛠️ Troubleshooting / Teaching Notes
If a student starts sketching immediately, redirect them to the problem statement and criteria first.
If a student gives a broad answer, ask what exactly has to stay safe and how success will be measured.
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