Question

You and your group are revising a draft research text proposing better lunch choices in schools. The intended audience is principals and district board members, who want clear, data-supported suggestions that can guide policy decisions.

While reviewing the text, you notice an opportunity to add a text feature that will strengthen the presentation of evidence.
Which text feature should be added to the research text to BEST illustrate the idea that school lunch choices have measurable impacts on student health and academic performance?

a timeline showing when national nutrition guidelines were updated over the last twenty years

a chart comparing data from multiple studies on how healthier lunches affect student focus, attendance, and energy levels

a bulleted list of student opinions on what foods they would like added to the menu

a photograph of a school cafeteria with a caption describing recent renovations

Answer 1

a chart comparing data from multiple studies on how healthier lunches affect student focus, attendance, and energy levels

Why: principals and board members need clear, quantitative evidence to make policy decisions. A comparative chart makes measurable impacts visible at a glance, shows consistency (or variation) across studies, and highlights effect sizes for outcomes that matter to schools (attendance, concentration, academic performance, energy).

How to make it most effective:
- Use a simple visual (bar or grouped bar chart, forest plot) that shows change or effect size for each outcome and each study or an aggregated estimate.
- Include sample sizes, outcome definitions (e.g., minutes of on-task behavior, % change in attendance), and confidence intervals or significance markers.
- Add short data sources and study dates in a caption so readers can verify findings.
- Consider one panel for health outcomes (BMI, nutrient intake) and one for academic/behavioral outcomes (focus, attendance, test scores) to keep the chart readable.