Evaluating Online Sources¶

Strategy · All strategies
Evidence · 2 claims (2 for) · 7 studies (3 causal, 3 quant-synthesis, 1 associational), q2–q4 · 2 of 7 report an effect size

Description¶

Evaluating online sources is a strategy that teaches learners to judge the credibility of web information by leaving the source itself to investigate it — checking who is behind it, what other outlets say about it, and whether claims are corroborated. The core routine is lateral reading: professional fact-checkers open new tabs and search for information about a source rather than reading deeper within it Wineburg & McGrew, 2019 [+S].

Design Implications¶

Lateral reading outperforms the checklist approaches (e.g., CRAAP tests) historically taught in schools, because checklists evaluate surface features of a page while expert fact-checkers evaluate the source's reputation and track record across the web [+S]. Instruction should model the strategy with authentic, messy web content — including sources designed to look credible — rather than sanitized examples Multiple contrasting cases support abstraction. [+M]. Learners benefit from Think-Aloud modeling of the evaluation moves before independent practice.

Context¶

Requirements¶

• Access to the live web (or a curated replica) so learners can actually leave the page and search
• A small repertoire of concrete moves: find the source's About page, search the organization's name plus "funding" or "bias," check claims against independent fact-checkers
• Instructor modeling of expert evaluation decisions, not just a rubric
• Practice with deliberately varied source types — advocacy sites, news, peer-reviewed work, sponsored content

Constraints¶

• Checklist-style evaluation (currency, relevance, authority surface features) produces poor discrimination between professional and amateur sources [-S] — students taught only checklists rate professionally designed misinformation as credible
• Lateral reading requires prior knowledge of the information ecosystem; learners unfamiliar with news outlets, think tanks, or domain suffixes cannot interpret what they find [~M]
• Effectiveness drops when practice uses only obviously credible or obviously fake sources; learners need near-miss cases to build calibration
• Heavy evaluation routines can discourage engagement with legitimate but imperfect sources, producing blanket skepticism rather than calibrated trust [~W]

Implementation Variability¶

• Lateral reading routines (Stanford History Education Group's Civic Online Reasoning curriculum): short, repeated lessons with real websites
• Corroboration tasks: learners triangulate a claim across three independent sources before using it
• Reverse image search and provenance checks for visual media
• Error analysis with planted misinformation: learners evaluate sources containing deliberate flaws, similar to Erroneous Examples in problem solving

Target Learners¶

• Secondary and post-secondary students, who encounter most information through search and social media [+S]
• Effective across ability levels; low-prior-knowledge learners gain the most from explicit modeling of the moves [~M]
• Less transfer for very young learners without the search fluency to execute lateral moves independently

Target Learning Goals¶

• Information literacy: judging source credibility and bias
• Critical reading: distinguishing evidence from assertion
• Civic reasoning: making informed judgments about contested public claims

Instructions¶

1. Model the strategy with a Think-Aloud: open an unfamiliar website and verbalize each evaluation move — who is behind this, what do others say about them, is this claim corroborated?
2. Contrast cases: present a professional-looking advocacy site and a plain-looking news report; have learners evaluate both, then reveal the actual credibility of each Multiple contrasting cases support abstraction. [+M]
3. Have learners perform lateral reading on new sources, then Self-Explanation their verdicts — articulating why a source earned or lost trust Self-explanation improves conceptual understanding. [+M]
4. Fade support: move from guided whole-class evaluation to independent evaluation with a brief prompt card, consistent with Scaffolding and Fading
5. Integrate into authentic tasks — research papers, Argumentation exercises, or Case Studies — so evaluation is applied, not isolated

Related Strategies¶

• A Finder's Guide to Facts — a complementary framework for assessing factual claims
• 3-Source Rule — a corroboration heuristic that operationalizes triangulation
• Activating Prior Knowledge — background knowledge of the information ecosystem determines what learners can infer during evaluation
• Parents and educators should search multiple sources — app stores, expert review sites, and producers' websites — when selecting literacy apps
• Teach students a broad set of strategies including sourcing, scrutinizing evidence, and corroboration to enable judging the accuracy of diverse online claims
• Use corroboration across multiple sources, including lateral reading, when lacking relevant prior knowledge

Examples¶

• Stanford History Education Group — Civic Online Reasoning — Free curriculum built on lateral reading research; lessons use real websites and professional fact-checker strategies [+S]
• NewsGuard — Browser extension applying journalist-written credibility ratings; used in media literacy instruction as a scaffold for lateral reading
• Snopes / FactCheck.org practice tasks — Learners verify a viral claim by tracing it to its origin and checking independent fact-checker verdicts

Key Sources¶

• Wineburg, S., & McGrew, S. (2019). Lateral reading and the nature of expertise: Reading less and learning more when evaluating digital information. Teachers College Record, 121(11), 1–40. doi:10.1177/016146811912101102
• Breakstone, J., Smith, M., Wineburg, S., Rapaport, A., Carle, J., Garland, M., & Saavedra, A. (2021). Students' civic online reasoning: A national portrait. Educational Researcher, 50(8), 505–515. doi:10.3102/0013189x211017495
• McGrew, S., Ortega, T., Breakstone, J., & Wineburg, S. (2017). The challenge that's bigger than fake news: Civic reasoning in a social media environment. American Educator, 41(3), 4–9.
• Paul, R., & Elder, L. (2019). The miniature guide to critical thinking concepts and tools (8th ed.). Rowman & Littlefield.