9
Evaluate
Presentations & Reflection
Duration
45 minutes
Type
Unit Closure
Standards
MS-ETS1-2, SL.7.4
Learning Objectives
Students will be able to:
- Present their design challenge solutions using evidence and reasoning
- Evaluate peer presentations using established criteria
- Reflect on the engineering design process and their learning
- Connect classroom learning to real-world applications
Presentation Guidelines
Presentation Structure (3-5 minutes per group)
| Section | Time | What to Include |
|---|---|---|
| 1. The Problem | 30 sec | Your assigned scenario and constraints |
| 2. Your Solution | 1 min | Design choices and modifications |
| 3. The Evidence | 1.5 min | Data showing your solution works |
| 4. Cost-Benefit | 30 sec | How it compares to alternatives |
| 5. Recommendations | 30 sec | What you'd advise for this scenario |
Audience Role
- Listen actively and respectfully
- Complete peer evaluation form for each presentation
- Prepare one thoughtful question for each group
- Use question starters like: "How did you decide to...?", "What would happen if...?", "Why did you choose...?"
Peer Evaluation Criteria
Rate each presentation on these criteria (4 = Excellent, 3 = Good, 2 = Developing, 1 = Needs Improvement):
| Criterion | What to Look For |
|---|---|
| Clear problem statement | Did they explain their scenario and constraints well? |
| Solution explained well | Did they describe their design choices clearly? |
| Used data as evidence | Did they show calculations to support their design? |
| Compared to alternatives | Did they discuss cost-effectiveness vs. other options? |
| Answered questions well | Did they respond thoughtfully to audience questions? |
Class Discussion: Best Features
After all presentations, we'll identify what worked well:
Most Innovative Design
Which group had a creative solution to a constraint?
Best Use of Data
Which presentation used evidence most effectively?
Most Practical
Which design would be easiest to implement in the real world?
Best Cost-Effectiveness
Which design offered the best performance for the budget?
Self-Reflection
Take a few minutes to reflect on your learning throughout this unit:
- The Engineering Design Process: Which step was most challenging for you? Which was most satisfying?
- Skills Development: How did your understanding of air quality science, math application, and teamwork grow?
- Key Learning: What is the most important thing you learned in this unit?
- Real-World Application: How might you use what you learned outside of school?
- If You Could Do It Again: What would you do differently in your CR box design?
Engineering Design Process Review
Throughout this unit, you followed the complete engineering design process:
| Step | What You Did |
|---|---|
| Define the Problem | Identified the need for affordable, effective indoor air cleaning |
| Research | Learned about filtration, MERV ratings, CADR, and ACH |
| Criteria & Constraints | Established performance requirements and budget limits |
| Brainstorm | Explored different CR box configurations |
| Build Prototype | Constructed your CR box air purifier |
| Test & Evaluate | Collected PM2.5 data and calculated actual CADR |
| Iterate/Improve | Optimized design for specific scenarios |
| Communicate | Presented your solutions with evidence |
What's Next?
For the Class
- Display CR boxes in school
- Present to other classes
- Write article for school newsletter
- Create how-to video
For Individuals
- Build CR box at home
- Monitor home air quality
- Research other IAQ solutions
- Explore engineering careers
Community Connections
- Donate CR boxes to community organizations
- Present to school board
- Partner with local health department
- Create community build events
Unit 7 Complete!
Congratulations! You have completed the Engineering Air Purifiers unit. You have:
- Learned the science of air quality and filtration
- Applied mathematics to real-world calculations
- Used the complete engineering design process
- Built functional air purifiers that actually work
- Collected and analyzed real data
- Communicated your findings like professional engineers
You're now part of a global movement for cleaner indoor air!