Quick summary: Students design a survey of school waste bins (rubbish, recycling and composting) that estimates volumes of waste before and after lunch and estimate the percentage of contamination. They calculate the area the bins service by breaking up the area into squares and triangles.
This lesson has been developed as part of the Schools Recycle Right Challenge for Planet Ark’s National Recycling Week. Register your lesson or other activities so they can be counted towards the national achievement and to receive other free support materials.
Learning goals: Calculate volumes and areas and use percentages to describe an issue.
Australian Curriculum content descriptions:
Year 8 Mathematics:
- Choose appropriate units of measurement for area and volume and convert from one unit to another (ACMMG195)
- Solve problems involving the use of percentages, including percentage increases and decreases, with and without digital technologies (ACMNA187)
Year level: 8
Time needed: 50 to 70 min broken up before and after lunch.
Level of teacher scaffolding: Medium to high – Students will need to help estimate the volumes in whatever shaped bins your school has.
Resources needed: Metre rulers, measuring tapes or trundle wheels, tablet or clipboard and paper to record data.
Digital technology opportunities: Enter data into digital worksheet.
Extension: Students create a YouTube/Vimeo clip outlining their finding.
There’s an app for that: aluminate – Alcoa Recycling’s Aluminate app gives you all the tools you’ll need to keep track of all the aluminium cans you’ve recycled.
Assumed prior learning: Aspects of the waste stream including rubbish, recycling and composting.
Key words: Contamination, estimation, recycle, waste, rubbish, compost.
These Planet Ark resources were developed by Cool Australia with funding from the Alcoa Foundation.
Cool Australia’s curriculum team continually reviews and refines our resources to be in line with changes to the Australian Curriculum.