New
New
Year 3

Shell structures

I can understand how packaging designs are structured.

New
New
Year 3

Shell structures

I can understand how packaging designs are structured.

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These resources were created for remote use during the pandemic and are not designed for classroom teaching.

Lesson details

Key learning points

  1. Packaging designs can be disassembled to see how the folded out net has been made.
  2. Critiquing one product design provides detail about future designs.
  3. Packaging designs consider how to stack multiple units on shelves.
  4. Design specifications include new product design, such as a sustainable packaging prototype for biscuits.

Keywords

  • Net - a flat or opened up shape of a 3D object

  • Design specification - a list of things a product must have or do

  • Sustainable - using what we need while protecting the environment, so there's enough for the future

  • Materials - what things are made from

Common misconception

Packaging is constructed from lots of separate pieces.

Packaging is often one piece of material constructed as a net.


To help you plan your year 3 design and technology lesson on: Shell structures, download all teaching resources for free and adapt to suit your pupils' needs...

It is recommeneded that an adult models or demonstrates how to disassemble cardboard packaging correctly, locating the glued seams and gently prising them apart, in order to retain the 2D net shape.
Teacher tip

Equipment

Biscuits in different styles of packaging. A range of cardboard and paper packaging products including boxes, sleeves and trays.

Content guidance

  • Exploration of objects

Supervision

Adult supervision recommended

Licence

This content is © Oak National Academy Limited (2025), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Lesson video

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6 Questions

Q1.
Which of these is not a type of packaging?
jar
box
bottle
Correct answer: eggs
tin
Q2.
Which material is most likely to be used to package shoes?
An image in a quiz
glass
wood
metal
Correct answer: cardboard
plastic
Q3.
Which is not an example of sustainable packaging?
compostable bags
boxes made from recycled material
reusable glass jars
Correct answer: non-recyclable, single-use plastics
Q4.
Match the packaging materials to the descriptions.
Correct Answer:glass jars/bottles,long-lasting, reusable but breakable

long-lasting, reusable but breakable

Correct Answer:plastic bottles,not all types can be recycled, takes a very long time to break down

not all types can be recycled, takes a very long time to break down

Correct Answer:cardboard box,can be recycled easily

can be recycled easily

Correct Answer:metal tin,very strong but heavy, can be recycled

very strong but heavy, can be recycled

Q5.
Which 3D shape is this the net of?
An image in a quiz
cuboid
Correct answer: cylinder
pyramid
sphere
cube
Q6.
What do we call the list of things a new product must do or have, which is written at the start of the design process?
cross-section diagram
prototype
evaluation
Correct answer: design specification

4 Questions

Q1.
Which 3D shape would have a net like this?
An image in a quiz
An image in a quiz
An image in a quiz
Correct Answer: An image in a quiz
An image in a quiz
Q2.
What does the word 'stackable' mean?
put into a box
Correct answer: can sit on top of others
irregular-shaped product
a rounded shape
Q3.
What is a 'sustainable' material?
one that will run out
one that harms the environment
Correct answer: one that can be replaced
one that is made from wood
Q4.
Which material is Jun describing?
An image in a quiz
paper
cardboard
glass
Correct answer: plastic
metal