6 Synthesizing Information and Drawing Conclusions

Clarify the question and evaluate sources

Begin by identifying exactly what you need to find out. Then consider each source’s Relevance, Origin, Purpose and perspective, and Evidence and limitations. Ask who created it and when; whether it was meant to inform, persuade, record, or sell; what point of view might shape it; whether it shows where its information came from; and what it might leave out.

A source can be useful without being complete or neutral. Comparing sources can help check whether a claim is supported, identify disagreements, and notice what still needs investigation.

Read charts and graphs carefully

Before interpreting a chart or graph, check its title, labels, units, time period, scale, and data source. Describe what it shows, such as a rise, a fall, a difference between groups, or an outlier. Consider features that may affect interpretation, including a vertical axis that begins above zero, missing time periods, or unclear definitions.

A chart represents data selectively rather than telling the full story. Ask what information is emphasized, omitted, or difficult to see. Keep Observation separate from Inference: “The number increased from 40 to 55” reports a detail, while “The program may have contributed to the increase” proposes an explanation that may need evidence beyond the chart.

Compare evidence across sources

Organize evidence by the question or claim it addresses. For each item, note its source and whether it supports, challenges, or adds context to other evidence. Look for Agreement, Difference, Complementarity, and Gaps: independent sources may point to a similar finding; sources may report different figures, perspectives, or interpretations; one source may add information others lack; or the available evidence may not answer part of the question.

When sources disagree, do not simply choose the one that matches your first impression. Check whether they cover the same population, place, time period, and definitions. Differences may reflect those choices rather than a true contradiction.

Build a justified conclusion

A well-supported conclusion follows a clear chain: state a Claim that directly answers the question, give the most relevant Evidence from more than one source when available, explain through Reasoning how those details support the claim, and include a Qualification that states an important limitation or uncertainty.

For example, a school is considering whether to extend its library’s after-school hours. A student survey finds that many respondents want more time, a six-week attendance chart shows that visits are highest on Tuesdays and Thursdays, and a short article says students without a ride home may have difficulty staying later. A justified conclusion is that the school should consider a limited trial of later library hours on Tuesdays and Thursdays. The survey shows interest, and the chart identifies the busiest days; however, the article raises a transportation concern. The school should ask students and families about transport before extending hours more widely. The chart supports a pattern in visits, but by itself does not prove that later hours would cause more students to use the library.

Communicate conclusions clearly

Present the conclusion first, then connect each piece of evidence to it. Name or describe each source so readers can tell where the information came from. Use precise wording: “shows” for a directly reported detail, “suggests” for a reasonable inference, and “may” or “could” when evidence is limited. Do not claim that a source proves more than it actually shows.

Before sharing a conclusion, check that you answered the question, used relevant evidence from the sources and displays, explained how the evidence supports the conclusion, accounted for disagreement, bias, or missing information, and used wording no more certain than the evidence allows.

Synthesis combines relevant evidence from different sources to form a supported conclusion. A strong conclusion makes clear what the evidence shows, how it supports the answer, and what limitations remain.