Planning tool

Students:

• provide a definition of a net
• describe the properties of 2D and 3D shapes
• match 3D objects with their nets
• construct 3D shapes from 2D drawings
• construct 3D shapes using a net.

Some students may:

• find visualisation difficult. They may need to practise with actual objects. It can be difficult for some students to understand that not all parts of the 3D object can be seen.
• may not yet understand the meaning of 2D and 3D. Make explicit that 2D are shapes in one plane and that 3D objects have length and height but also width – hence the three dimensions.

The Learning from home activities are designed to be used flexibly by teachers, parents and carers, as well as the students themselves. They can be used in a number of ways including to consolidate and extend learning done at school or for home schooling.

Learning intention

• We are learning about the relationship between 3D objects and their nets.
• We are learning how to match 3D objects with their nets.

Why are we learning about this?

• Many products come in packaging of different shapes and sizes.

What to do

Find three objects normally found in cardboard packaging, such as cereal, cake mix, chocolate, pasta or dried fruit. For each package, answer the following. Name the 3D object. Draw the type of net you think is used to make the packaging. Carefully disassemble the packaging to reveal its net. Compare the nets of each package. How are they different and how are they similar? Draw the dimensions of each package. What space does each package take up? What units would you use to describe this measurement? (A clue: it has 3 dimensions – length, width and height.)

Success criteria

I can:

• describe 3D objects
• connect models of 3D objects to their nets
• calculate the volume of various objects.