Present environmental data and encourage a useful discussion

A lower total is not a complete explanation

• A fictional school club measured mixed waste from one room on three Fridays: 8 kg, 6 kg and 5 kg. The total fell, but the club did not record attendance or separate material types. A presentation should show the change without inventing its cause.
• This original GAC007-aligned lesson practises a formal data presentation and interactive discussion. The figures are invented teaching data. The graph is a prompt for speaking, not published environmental evidence or a prediction of future results.

Read the measure and its scale

• The vertical axis is mixed-waste mass in kilograms and begins at zero. The three bars show separate Fridays, not daily totals or every room in the school. Name the measure, place and time window before describing a trend.
• The overall fall is 3 kg, from 8 to 5. Do not say that the final total is zero or that all waste types fell. A single combined measure cannot show the movement of each component unless those components were measured separately.

Give an overview before individual numbers

• Use three moves: scope → main pattern → key evidence. “The graph shows mixed waste from one room over three Fridays. The measured total fell, from 8 kg to 5 kg, with 6 kg in the middle week.” This gives the audience a clear pattern without reading the axis labels one by one.
• Add the limit beside the claim: attendance and material categories were not recorded. A smaller group could affect the total, and the club cannot identify which materials changed. That is a reason for a more careful next measurement, not a reason to hide the graph.

{callout:example} We recorded a fall of 3 kg in this room's mixed waste. However, we did not count attendance, so the totals do not establish a per-person change. Next time, we propose recording attendance and separating the main material categories. {/callout}

Invite contributions with a focused question

• Ask, “What additional information would help us interpret the fall?” rather than “Everyone agrees our campaign worked, right?” The first invites inquiry; the second pressures the audience toward a claim the data cannot establish.
• Build on a reply: “You suggested attendance. How could we record a room total without collecting names?” If someone proposes a new campaign, ask how its outcome would be checked. Discussion should develop the decision, not become a competition for the loudest answer.

{callout:warn} Do not present a proposal as an approved action or describe the three-week pattern as proof that one campaign caused it. Keep observation, explanation and next decision separate. {/callout}

Include another voice and summarise fairly

• Invite a quieter participant without forcing private disclosure: “Would anyone who has not spoken like to add a question?” Give them time. If they decline, move on respectfully; silence is not evidence that they agree with the plan.
• Summarise contributions without changing their certainty. “Two people suggested recording attendance; one asked how categories would be defined.” Then state what remains undecided. A fair summary does not turn suggestions into unanimous approval.

Rehearse the presentation and a discussion close

• Give a one-minute presentation using the graph and invite two questions. A partner checks scope, units, trend, evidence and limitation. No reviewed recording is attached; this is live partner rehearsal and text/visual comprehension practice.
• Close with a next step: seek permission for a clearer measurement plan, agree categories and record room attendance totals if approved. Name the unresolved issue instead of claiming the project is finished. Revise any sentence that promises an unmeasured effect.

{callout:key} Present the scope and measured pattern, state limits and use focused questions to develop the next decision. A falling total alone does not establish its cause. {/callout}