Activity Introduction


In this lesson, students will access information about seaweed farming and greenhouse gas emissions and use percentages, ratios, and fractions to solve problems.


Students will also investigate the relationship between seaweed farming, the health benefits of eating seaweed and climate change. They will use then this information to develop an infographic that uses numbers to convince their peers to eat more seaweed.


Learning Intentions

  • Students will understand fractions, decimals and percentages
  • Students will understand simple ratios
  • Students will learn how seaweed farming can help reduce CO2 emissions and therefore help combat climate change
  • Students will understand the relationship between seaweed farming, the health benefits of eating seaweed and climate change

Lesson & Curriculum Details

  • Topic: Learning Through Film, Ocean Conservation, Climate Change, Sustainability
  • Unit of work: 2040 – Mathematics – Years 7 to 10
  • Time required: 150 mins.
  • Level of teacher scaffolding: Medium – facilitate class discussion, support students in understanding climate change terminology, facilitate collaborative learning, guide students in developing an appropriate infographic.
  • Keywords: Climate change, seaweed farming, carbon emissions, greenhouse gas, carbon dioxide, drawdown, 2040 documentary, sustainability, ocean conservation, habitat.

To view our Australian Curriculum alignment click here.

To view our NZ Curriculum alignment click here.

Resources Required

  • Student Worksheets – one copy per student.
  • Device capable of presenting a video to the class.
  • Devices capable of producing infographics.
  • Printer access (optional).
  • Poster paper OR liquid chalk and a large window.
  • Sticky notes.
  • Seaweed articles – 5 sets of the 5 articles.

Accessing the Film

2040 is an innovative feature documentary that looks to the future, but is vitally important NOW!  Director Damon Gameau embarks on a journey to explore what the future could look like by the year 2040 if we simply embraced the best solutions already available to us to improve our planet and shifted them rapidly into the mainstream. 

In Australia: Order the Schools Version of the 2040 DVD. The Schools Version includes an educational license and is for Australian primary and secondary schools that wish to utilise the film as a learning tool or host free on-site screenings for the school community.

In New Zealand: Find out how to see the film here. 2040 is currently only available in NZ cinemas and you can make a group booking for your class at your local cinema. The Schools Version of the DVD and BluRay will be released in New Zealand on 7th November 2019. This version includes an educational licence that covers classroom use and on-site screenings for the school community. To pre-order a copy for your school, please email: [email protected].


Cool Australia’s curriculum team continually reviews and refines our resources to be in line with changes to the Australian Curriculum.

Cool Australia, GoodThing Productions and Regen Pictures would like to acknowledge the generous contributions of Good Pitch AustraliaShark Island InstituteDocumentary Australia FoundationThe Caledonia Foundation and our philanthropic partners in the development of these teaching resources.



Teacher Worksheet

Teacher Preparation

Learning intentions: Students will:

  • … understand what fractions, decimals and percentages are
  • ... understand simple ratios
  • ... learn how seaweed farming can help reduce CO2 emissions and therefore help combat climate change
  • ... understand the relationship between seaweed farming, the health benefits of eating seaweed and climate change

Success criteria: Students can…

  • ... solve connect fractions, decimals and percentages and carry out simple conversions
  • ... find percentages of quantities and express one quantity as a percentage of another, with and without digital technologies
  • ... recognise and solve problems involving simple ratios
  • ... develop an infographic that uses numbers to convince peers to eat more seaweed

Teacher content information: A 2018 study by The University of Melbourne on the thoughts and concerns of young people from Generations X and Y found the number one concern across both groups was lack of action around climate cha

- or - to view worksheets

Student Worksheet

Thought starter: What's so great about seaweed?

"Most of the world’s oxygen, about 70%, comes from seaweeds and algae. It is estimated that there are about 9 times more seaweeds in the oceans than there are plants on land." (Seaweed Enterprises Australia,

1. Watch this clip:

Marine Permaculture Password: 2040_EDU (

Note down any unfamiliar words or phrases you hear in the clip.

2. Go to and click on 'Chart View'.

Find Australia by looking on the bar chart or entering 'Australia' in the 'Countries' text box on the left.

How many MtCO2 did Australia emit in 2017?


Now work out how much of Australia’s emissions went into the ocean without using your calculator.
(Hint, 25 percent of all CO2 emissions are absorbed by our oceans.)

Express your answer as a mixed fraction and a dec

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