An effective explanatory piece selects accurate information, organises it clearly and expresses it with precision, so the reader gains genuine understanding. Assessors weigh how well content, structure and language serve the reader's need to know.
Ideas & Content
Accuracy and selection — the right information chosen and explained with enough depth.
The reader understands not just what, but how and why.
Explanations weaken when they are vague or incomplete.
Key concepts named but not actually explained is a clear weakness.
-
Accurate selection: chooses the right information and explains how and why it matters.
Let’s Focus
Three strands matter most this week: Ideas & Content, Structure & Cohesion and Audience & Purpose. The depth of ideas decides whether concepts are genuinely explained with mechanism and significance, or only labelled. How the three paragraphs are organised decides whether the reader can follow definition, examples and implications. The calibration for an educated non-specialist decides whether the explanation is accessible.
Ideas & Content
Strong writing this week shows Ideas & Content applied consistently — not just in isolated moments. Assessors look for depth that serves this task: tipping points explained with their mechanism and significance, not just named.
What markers scan for
- Ideas & Content applied consistently throughout — not only in isolated moments.
- The scientific demands of this topic visibly shaping the depth of explanation.
Score Bands
-
Basic
Ideas & Content is present but applied inconsistently or only at a surface level.
-
Strong
Ideas & Content is applied consistently, with genuine understanding of what this task requires.
-
Excellent
Ideas & Content is applied with sustained precision throughout, shaped by the specific demands of this task.
Structure & Cohesion
Strong writing this week shows Structure & Cohesion applied consistently — not just in isolated moments. Assessors look for organisation that serves this task: three paragraphs moving clearly through definition, examples and implications.
What markers scan for
- Structure & Cohesion applied consistently throughout — not only in isolated moments.
- The three-topic structure visibly shaping how each paragraph is organised.
Score Bands
-
Basic
Structure & Cohesion is present but applied inconsistently or only at a surface level.
-
Strong
Structure & Cohesion is applied consistently, with genuine understanding of what this task requires.
-
Excellent
Structure & Cohesion is applied with sustained precision throughout, shaped by the specific demands of this task.
Audience & Purpose
Strong writing this week shows Audience & Purpose applied consistently — not just in isolated moments. Assessors look for calibration that serves this task: an explanation pitched for an educated non-specialist, accessible without being over-simplified.
What markers scan for
- Audience & Purpose applied consistently throughout — not only in isolated moments.
- The educated non-specialist reader visibly shaping how the explanation is pitched.
Score Bands
-
Basic
Audience & Purpose is present but applied inconsistently or only at a surface level.
-
Strong
Audience & Purpose is applied consistently, with genuine understanding of what this task requires.
-
Excellent
Audience & Purpose is applied with sustained precision throughout, shaped by the specific demands of this task.
Student sample for assessment
Written by a Year 10 student in Mackay, Queensland, Australia.
Climate tipping points are thresholds in the Earth's climate system beyond which change becomes self-reinforcing and may be difficult or impossible to reverse. Unlike gradual climate change, tipping points involve a sudden shift in the state of a system: once the threshold is crossed, the system moves to a new state under its own momentum, even if the original forcing factor is removed. The concept is important because it means that climate risk is not linear — a system can appear stable and then change rapidly once a threshold is reached. Several tipping points are considered to be of particular concern by climate scientists. The melting of the Greenland ice sheet is one: as the ice melts, the darker ocean surface beneath it absorbs more heat than ice would, which accelerates the melting further in a feedback loop. The collapse of the Amazon rainforest is another: drought and deforestation reduce the rainforest’s capacity to recycle moisture, which can trigger further drying and eventually a transition from rainforest to savanna. The weakening of the Atlantic Meridional Overturning Circulation — the system of ocean currents that distributes heat around the Atlantic — is a third example. Each of these systems could pass through a tipping point within temperature ranges that current emissions trajectories are likely to reach. Understanding tipping points changes how we should think about climate risk in two important ways. First, it means that the relationship between emissions and outcomes is not proportional: reducing emissions by half does not reduce risk by half if some tipping points are near. Second, it means that the window for effective action is likely to be narrower than the visible rate of change would suggest. A system can remain apparently stable until very close to its tipping point, at which stage the transition becomes unavoidable. This has significant implications for policy: acting before tipping points are approached is substantially more effective than acting after they have been reached.
