Synthesizing Multiple Sources

Synthesizing is different from summarizing just one text. When you summarize a single source, you shrink it down to its main points. When you synthesize multiple sources, you take the main points from two or more texts and blend them into a new, combined summary. The goal is to show how the ideas connect, not just to repeat what each text said one after another.

For example, if one article explains why forests are important for clean air, and another article explains how logging is reducing forest size, synthesizing means writing a summary that connects both ideas, such as explaining that logging threatens a resource that keeps our air clean.

Follow these steps whenever you need to build a synthesized summary from more than one source.

1. Read each text carefully. Find the main idea and two or three supporting details in each one.
2. Look for connections. Ask yourself: Do these texts agree, disagree, or add different pieces to the same topic?
3. Group similar ideas together. Ideas that repeat across sources are usually the most important ones to include.
4. Write one summary in your own words. Blend the ideas into new sentences instead of copying lines from each text.
5. Check your summary. Make sure it reflects both texts fairly and does not leave out an important idea from either one.

This process builds on skills used in Synthesizing Ideas Across Texts, where the same basic approach is used to compare ideas across an entire set of readings.

It often helps to picture the ideas from each text as two overlapping circles. Ideas that only appear in one text stay on their own side. Ideas that show up in both texts belong in the middle, and those shared ideas usually become the backbone of your synthesized summary.

Text A: Bees carry pollen between flowers, which helps many fruit and vegetable crops grow. Farmers rely on bees to pollinate large fields of crops every year.

Text B: Bee populations have been shrinking due to habitat loss and pesticide use. Scientists warn that fewer bees could lower crop yields in the future.

Synthesized summary: Bees play an important role in pollinating crops that farmers depend on, but shrinking bee populations from habitat loss and pesticides could put future food supplies at risk.

Notice that the summary does not repeat each text separately. It pulls the main idea from each one, bees help crops and bees are declining, and connects them into a single, coherent sentence.

Synthesize: To combine information from two or more texts into one new, connected summary.

Main Idea: The most important point a text is making about its topic.

Common Theme: An idea, fact, or opinion that shows up in more than one source.

Coherent Summary: A summary where every sentence connects clearly and logically to the ideas around it.

Paraphrase: Restating an idea from a text in your own words instead of copying it.

Source: A text, such as an article, book, or website, that provides information on a topic.

Many students summarize each text separately and call it synthesis, but that only lists facts side by side without connecting them. Others copy phrases directly from the original texts instead of restating ideas in their own words. Watch for these mistakes as you write, and always check that your final summary reads as one connected idea rather than two separate reports glued together. Building strong synthesis skills now also prepares you for more advanced work such as Synthesizing Complex Sources, where you will combine ideas from longer and more detailed texts.

Related lessons

• Summarizing Information Synthesis