Quick summary: As a ‘thought starter’, students watch a short clip about a method of open-sea farming created by Sealeaf. To investigate the real-world application of this innovative farming method, students explore global mean sea levels from 1880 to 2013. Using a graph containing authentic data, your class will consider historic trends, calculate gradients of line segments, and comment on what the gradient represents. Finally, students will hypothesise who will be most affected by future sea level rise.
- Students understand how gradient and rate of change relates to authentic data.
- Students know how to calculate midpoints and gradient.
- Students discover the impact of sea level rise on a global scale and how the levels are changing over time.
- Students take personal action by undertaking further investigation and increasing community awareness.
21st century skills:
Australian Curriculum Mapping
Year 9 Mathematics:
- Solve problems involving direct proportion. Explore the relationship between graphs and equations corresponding to simple rate problems (ACMNA208)
- Find the midpoint and gradient of a line segment (interval) on the Cartesian plane using a range of strategies, including graphing software (ACMNA294)
Syllabus outcomes: MA3‑2WM.
General capabilities: Numeracy, ICT Capability, Critical and Creative Thinking
Cross-curriculum priority: Sustainability OI.1
Relevant parts of year 9 achievement standards: Students make sense of the position of the mean and median in skewed, symmetric and bi-modal displays to describe and interpret data.
Students find the distance between two points on the Cartesian plane and the gradient and midpoint of a line segment.
Topic: Number and Algebra, Climate change
Time required: 60 min.
Level of teacher scaffolding: Low – teacher may need to demonstrate skills.
Resources Required: Student worksheet, internet access, and Climate Change Digital Toolbox.
Keywords: Cartesian plane, mid-point, gradient, coordinate points, data, sea level, climate change.
Cool Australia’s curriculum team continually reviews and refines our resources to be in line with changes to the Australian Curriculum.