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Financial Mathematics and Proportion · Term 4

Percentage Increase and Decrease

Students will calculate percentage increases and decreases, applying them to various contexts like sales and growth.

Key Questions

  1. Why is a 10 percent increase followed by a 10 percent decrease not the same as the original price?
  2. Analyze the impact of successive percentage changes on an initial value.
  3. Construct a problem involving a percentage increase or decrease in a real-world context.

ACARA Content Descriptions

AC9M9N04
Year: Year 9
Subject: Mathematics
Unit: Financial Mathematics and Proportion
Period: Term 4

About This Topic

Representation and Reality asks Year 9 students to look behind the screen and analyze how media shapes our understanding of the world. They investigate how different social groups, including First Nations peoples, women, and multicultural communities, are portrayed in mainstream media. This topic aligns with ACARA's focus on analyzing media representations and the ethical responsibilities of media makers.

Students explore the concept of 'the gaze' and how framing, lighting, and casting can reinforce or challenge cultural stereotypes. This topic is highly discussion-based and benefits from collaborative investigations where students 'audit' current media (like news or advertising) to see whose voices are missing. Active learning allows them to move from passive consumption to critical analysis, helping them to become more ethical creators themselves.

Active Learning Ideas

Watch Out for These Misconceptions

Common MisconceptionMedia is just 'entertainment' and doesn't affect real life.

What to Teach Instead

Media representations shape our subconscious biases. Active 'deconstruction' of ads helps students see how repeated images create 'norms' that affect how we treat people in the real world.

Common MisconceptionIf a representation is 'positive', it's always good.

What to Teach Instead

Even 'positive' stereotypes (like the 'tech-savvy Asian') can be limiting. Peer discussions help students understand that 'complexity' is the goal of good representation, not just 'niceness'.

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Frequently Asked Questions

How do I talk about stereotypes without offending students?
Focus on the 'media construction' rather than the people. Use the ACARA framework to analyze 'codes and conventions' so the discussion remains academic and objective.
How can active learning help students understand representation?
By having students 'audit' their own media feeds, the lesson becomes personal and relevant. They aren't just hearing about bias; they are discovering it for themselves in the apps they use every day.
What is 'The Gaze' in media arts?
It refers to how the camera 'looks' at a subject, often from the perspective of a specific dominant group (e.g., the 'male gaze'). Students can explore this by filming the same scene from different 'perspectives'.
How does this link to ACARA standards?
It addresses AC9AME10R01 (analysing media representations) and AC9AME10C01 (evaluating media in social and cultural contexts).

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