A synthesis essay combines multiple sources into a unified argument. Unlike a research essay, which is usually longer and builds a more complete case, a synthesis essay (often assigned in AP English) is tighter and focuses on the move of using the sources together. The three things it has to do are take a position, cite at least three sources in support of a single claim, and show the sources talking to each other rather than just citing them in sequence.
Example essay
Illustrative example — figures, citations, and names may not represent real studies or people. Verify before quoting.
Why the Right to Repair Deserves Federal Legislation
The right-to-repair movement argues that consumers should be able to repair the products they own without manufacturer interference — access to parts, documentation, and diagnostic tools. As of 2026, five states have passed limited right-to-repair laws, and the FTC has signaled support, but no federal law exists. Drawing on sources from consumer advocacy, manufacturer filings, and environmental analysis, this essay argues that federal right-to-repair legislation is overdue — both because the arguments against it have collapsed under scrutiny and because the costs of waiting are concrete and mounting.
The manufacturer argument against right to repair rests primarily on safety and intellectual property. In a 2023 filing to the Massachusetts legislature (Source A), the Alliance for Automotive Innovation argued that unauthorized repair access could introduce "significant safety and cybersecurity risks" if consumers or independent shops modified vehicles without the training manufacturer technicians receive. The filing is specific and clearly written, and it deserves serious engagement rather than dismissal. The weakness of the argument, however, is that it proves too much — if it were correct, we would also need to ban independent mechanics entirely, and independent mechanics have been legal for a century without producing the safety catastrophe the filing predicts.
Consumer advocacy data sharpens the counterargument. The US PIRG 2023 report on repair markets (Source B) found that in states with stronger right-to-repair laws, independent repair shops had injury rates statistically indistinguishable from dealer shops, and consumer complaints about post-repair problems were actually lower at independents — likely because independents depend on repeat customers in a way that dealerships linked to warranty work do not. The safety argument the manufacturers raised is contradicted by the closest natural experiment we have, which is the comparison of states that already have partial right-to-repair laws to states that do not.
The environmental cost of the status quo is the argument that has gained the most momentum recently, and it is well-documented. Source C (an environmental-impact analysis) estimated that restricted repair policies generated roughly 1.5 million metric tons of additional US electronic waste in 2023 alone, primarily from devices that could have been repaired for less than 15% of replacement cost but were instead discarded because the manufacturer did not provide parts. The analysis is conservative — it excludes devices where repair cost data was unavailable — and even at that conservative estimate, the environmental case against manufacturer lock-in is substantial.
Synthesizing these three sources produces a coherent position: the safety argument manufacturers raise (Source A) is not supported by the empirical record in states with partial right-to-repair (Source B), and the environmental costs of maintaining the status quo (Source C) are large enough that inaction is itself a policy choice with measurable consequences. No single source makes this entire argument, but together they establish it. That is what synthesis is for — using sources to do work that no individual source could do alone.
The federal question is not whether right to repair is a good idea in principle. State-level experiments and the evidence above have settled that. The question is whether it should be left to state-by-state patchwork or established as a federal baseline. A federal law has the advantage that manufacturers can no longer use interstate commerce to dodge state-level requirements, and it has the disadvantage of being a blunter instrument. The balance of the evidence, taken from all three sources, favors federal legislation.
Breakdown
Introduction previews all three sources and the thesis
Drawing on sources from consumer advocacy, manufacturer filings, and environmental analysis, this essay argues that federal right-to-repair legislation is overdue...
A synthesis essay should tell the reader in the first paragraph which sources are coming and what claim they will support. This is different from a research essay, which can hold back source identification for longer.
First source steelmanned before being rebutted
The filing is specific and clearly written, and it deserves serious engagement rather than dismissal.
Synthesis essays fail when they cherry-pick sources. This one gives the manufacturer filing credit, notes its specific argument, and then rebuts it on the merits. The move makes the rebuttal trustworthy.
Second source contradicts the first directly
the closest natural experiment we have, which is the comparison of states that already have partial right-to-repair laws to states that do not.
The second source is not introduced as another opinion — it is introduced as evidence against the first source's claim. Synthesis is strongest when sources are put in direct conversation, not listed in parallel.
Third source adds a dimension the first two did not cover
Source C (an environmental-impact analysis) estimated that restricted repair policies generated roughly 1.5 million metric tons of additional US electronic waste in 2023 alone...
The third source brings environmental evidence, which neither of the first two covered. A good synthesis selects sources that cover different parts of the argument rather than sources that all make the same point.
Explicit synthesis move
No single source makes this entire argument, but together they establish it. That is what synthesis is for — using sources to do work that no individual source could do alone.
The essay explicitly names the synthesis move. This may seem heavy-handed, but in a synthesis essay it is the move the assignment is asking for, and making it visible shows the reader the combined argument.
Closes with the specific policy question the synthesis answers
The question is whether it should be left to state-by-state patchwork or established as a federal baseline.
The conclusion reframes the question more narrowly than the introduction did — now that the evidence is on the table, the remaining question is about level of government. This narrowing is what makes the closing feel earned.
Writing tips
Pick sources that cover different parts of the argument, not sources that all say the same thing. Steelman each source before rebutting or qualifying it. Use explicit transition phrases that put sources in conversation ("contradicts", "extends", "is supported by") rather than listing them in parallel. Close by naming what the combined evidence establishes that no single source could.