1. Toilet Paper Net Challenge
5TC Solving Real Life Problems

2. Problem
Ms Tina drove to the store to purchase toilet paper. She purchased 12 rolls and returned home. She discovered that the toilet paper rolls did not have a center hole.
The problem with this was that she could not place the rolls on her dispencer.

3. Design Challenge Be creative when naming your final product.
In pairs, design 2 containers to hold and dispense 1 toilet roll each.
Process order
Think, plan, measure, design, test, construct prototype, test, (redesign if needed, test) construct final product.
Helpful hints
Spend time planning your nets on paper.
Check measurements of toilet roll.
Ensure your net will completely encase the toilet roll.
Ensure your net will allow for a replacement toilet roll.
Practice your net using paper first.
Make any adjustments, plan decorations and prepare prototype net for copying.
Construct final net from prototype.
Decorate your final net before constructing it.
Test your product with the toilet roll.
Present your product to the class.
Be creative when naming your final product.

4. Learning Intention Students will;
Apply their knowledge of geometrical skills to solve a problem.
Calculate and use PI
Calculate circumference and area of a circle.
Measure and design a net to size.
Apply their ideas and creativity to solve a problem.
Work collaboratively with others sharing ideas
Support others with issues such as remembering formulas.
Plan and build prototypes
Demonstrate pride when showing off the final design

5. Success Criteria Students have:
Produced a product that solves the problem.
Reflected on their process.
Recorded planning (including calculations & prototype net plans).

6. Circumference = π x d or π x r x 2
The Process - Measure
Which formula do I use?
Circumference = π x d or π x r x 2
and
Area = π x r2
Which tool should I use to measure the circumference and area of this roll?
Students measured the circumference and area of the roll using a range of equipment.

7. The Process - Calculate
Students applied their knowledge of formulas to calculate area and volume for the size of their construction.
Let’s check our calculations with a calculator!

8. The Process - Brainstorm
Hmmmmmmm
Students brainstormed ideas for containers before developing nets
What if we rolled it like this…?
Do you think this shape will work?

9. The Process - Collaborate
Students collaborated on the design for the product.
How about we...
What about if we did this…?
Could we try doing this…?

10. The Process - Calculation
If PI is 3.14 and to get the area I have to multiply radius x radius then the formula should be
π x r2
Students checked their calculations of the net designs
“But isn’t the formula for finding the area of a circle π x d?”
“Ah… I don’t think so, isn’t it π x r2?”

11. The Process - Prototypes
Students started making their nets for their dispenser prototype.
If we join multiple sheets of paper together we can draw our net in one go.

12. The Process - Construction
Students began constructing their prototype containers. But there was a problem… Some constructions were being made with individual pieces of paper and not nets

13. Net Check
What is a net again?
Ms Tina pulled apart a tissue box net

14. Construction Continued

15. Construction Continued

16. Student Voice
Please Watch student voice from the separate video.

17. Final Products
Creating this product was challenging. Getting the shape and measurements correct was difficult.
My favourite part of the challenge was creating and decorating the product. Meet Chompy!

18. A Range of Final Products
This one pulls from the bottom
This one pulls from the top.
This one pulls from the side

19. This one is a cylinder with yellow stripes
More Final Products
This one is a cylinder with yellow stripes
This one has a famous label

20. More Final Products
Both these products have teeth or serrated edges.

21. All in All Success Was Had.