C. Comprehension: Understanding and Responding to Texts · Reading Like a Critic: Understanding and Responding to TextsCredibility, Reliability and Significance: Analyzing Information and Drawing Conclusions
C3.3 A2.3About 70 minutes
Learning goals- I can assess the credibility of a source (who made it, their expertise and purpose).
- I can assess the reliability of information (evidence, corroboration, how current and consistent it is).
- I can judge the significance of information for my question or for a text's meaning.
- I can use lateral reading and formulate a conclusion supported by the strongest evidence, in informational and literary texts.
Words to know
credibility
How trustworthy a source is, based on its creator's expertise, reputation, transparency and purpose.
reliability
How accurate and dependable the information is: supported by evidence, confirmed by other sources, current and consistent.
significance
How important or relevant information is for a particular question or for a text's meaning.
peer-reviewed
Checked by other experts in the field before publication.
corroborate
To confirm information with another independent source.
lateral reading
Leaving a web page to check what other sources say about it and its creator.
anecdote
A short personal story; it can illustrate a point but isn't strong evidence on its own.
conclusion
A judgment reached by weighing evidence; it should match the strength of the evidence.
Remember from Grade 8
In Grade 8 you thought about bias and perspectives in texts and your online feed, and you synthesized sources to draw conclusions. In Grade 9 you'll separate three different questions, credibility, reliability and significance, and use them to analyze both informational and literary texts.
Hook: 600 likes
A post in your town's online group has 600 likes and 200 shares. Does that make it true? Popularity measures attention, not accuracy. In this lesson you'll learn the questions that fact-checkers ask instead.
Research question: Should our town allow electric scooters on its bike paths? Here are four invented sources.
Source A: Town of Pine Ridge transportation report (March 2026). Written by the town's transportation planning staff. It reports that the town's police recorded 4 collisions involving e-scooters on bike paths in 2025 and 38 involving bicycles, but notes that far more bicycles than e-scooters use the paths, so the numbers can't be compared directly. It recommends a speed limit of 20 km/h and a one-year trial. Data tables are attached.
Source B: "Scoot Safe!" blog post on the website of ZipGo, an e-scooter rental company (2026). It says, E-scooters are 100% safe and the greenest way to travel! It includes a smiling customer photo and a discount code. No data or sources.
Source C: An anonymous post on a local social media group (yesterday). My cousin's friend almost got hit by a scooter on the river path!! These things need to be BANNED. It has 600 likes and 200 shares.
Source D: A university study published in a peer-reviewed journal (2019). Researchers studied hospital records of e-scooter injuries in two large cities in another country during their first year of rental scooters. They found that many injuries involved riders without helmets and inexperienced first-time riders.
Worked exampleLet's assess each source
Assess Sources A to D for credibility, reliability and significance to the research question.
- Source A (town report): Credible: written by transportation staff with access to police data; purpose is public planning. Reliable: gives numbers, attaches data, and honestly notes a limitation (more bikes than scooters, so raw counts can't be compared). Significant: it's about our town's paths and recent (2026). Strongest source.
- Source B (company blog): Low credibility: the company profits from scooters. Unreliable: 100% safe is an absolute claim with no evidence (no form of transport is 100% safe). Significance: low, beyond showing the company's position.
- Source C (anonymous post): Low credibility: no name, second-hand (my cousin's friend). Unreliable: an anecdote that can't be checked; likes and shares don't confirm it. Significance: it shows some residents are worried, which matters to a town decision, but it isn't evidence of how often collisions happen.
- Source D (university study): Highly credible: researchers, peer-reviewed. Reliable methods (hospital records). Partly significant: it's from another country, 2019, and about large cities in their first year of rental scooters. Its findings (helmets, inexperience) are useful for rules, but may not match a small Canadian town today.
A is credible, reliable and significant. D is credible and reliable but less significant (different context and time). C is not reliable evidence but signals public concern. B is neither credible nor reliable. Notice that credible and significant are different questions.
Formulating a conclusion
A good conclusion matches the strength of the evidence. It doesn't claim more than the sources show, and it admits what's uncertain.
Weak conclusion: Scooters are dangerous and should be banned. (Based on Source C's anecdote.)
Strong conclusion: The town's 2026 data recorded relatively few e-scooter collisions on bike paths, though the numbers are hard to compare with bicycles. Research from other cities links injuries to inexperienced riders and missing helmets. So the town could allow e-scooters on a one-year trial with a speed limit and safety rules, then review the results.
Notice the strong conclusion: uses the best sources, qualifies claims (relatively few, hard to compare), and recommends testing, not certainty.
Credibility, reliability and significance in literary texts
These questions matter in literature too:
- Memoir: the author is credible about their own experiences and feelings, but memory can be unreliable about exact dates or words spoken years ago. Good memoirists often admit this.
- Historical fiction: the characters may be invented, but readers can check whether the historical events are accurate. An author's note often tells you what's real.
- Narrators: you already know a narrator can be unreliable (Lesson 6). The same habits apply: look for contradictions and evidence.
- Significance of details: in a short story, not every detail matters equally. A significant detail connects to character, conflict or theme (the tomato greenhouse in Do Not Open Until Spring; the re-taped stick in Cut). Asking Why is this detail here? is how you find meaning.
Worked exampleLet's assess significance in a story
In Cut (Lesson 8), which detail is more significant to the scene's meaning: (a) It's 10 p.m. or (b) Dev re-tapes the stick quickly and neatly? Explain, and draw a conclusion.
- (a) 10 p.m.: sets the time pressure (the night before tryouts) and explains Dad's Lights out. Some significance for mood.
- (b) re-taping: shows Dev still has the skill and is now using it to help Meera. It's the turning point in action, linked to the title Cut and the theme of support.
- Weigh: (b) connects to character change and theme; (a) supports setting and mood.
(b) is more significant: it carries the scene's central change. Conclusion: The scene's meaning depends most on Dev's actions at the end, which show his move from avoidance to support.
Just for funI read a website that said 87% of statistics are made up on the spot.
Then I checked its sources. It didn't have any.
Hands-on activityFact-check a viral claim
You need: a device with internet (with a grown-up's permission), paper, a pencil.
- With a grown-up, pick a claim you've seen online or heard (for example, about a health tip, an animal fact, a sports record or a weather event). Write it down exactly.
- Read laterally: open new tabs. Who first made the claim? What do two independent, credible sources say (such as a government agency, a university, a major news organization, a museum)?
- Fill in a chart for each source: Credibility (who, expertise, purpose), Reliability (evidence, current, confirmed?), Significance (does it answer the exact claim?).
- Write a conclusion that matches the evidence: true, false, partly true, or not enough evidence. Include one qualifying word (mostly, likely, in some cases).
Online safety: don't click pop-ups or enter personal information, and stay on sites your grown-up approves.
What to look for: at least two independent sources, a filled chart, and a conclusion that doesn't claim more than the evidence shows.
Your turn
1Why is Source B's claim 100% safe a sign of unreliable information?
It's an absolute claim with no evidence, and no form of transportation is completely safe. It's also from a company that profits from scooters.
2Source C has 600 likes. Does that make it reliable? Explain.
No. Likes measure attention and agreement, not accuracy. The post is anonymous and second-hand, so it can't be verified.
3Source D is peer-reviewed. Why is it still less significant than Source A for this question?
It's from another country, 2019, and large cities in their first year of scooters, so its context differs from our town today.
4What limitation does Source A admit, and why does admitting it increase reliability?
More bicycles than scooters use the paths, so the collision numbers can't be compared directly. Admitting limits shows honesty and care, which makes the report more trustworthy.
5Rewrite this weak conclusion to match the evidence: Scooters never cause problems.
Sample: Town data recorded few e-scooter collisions on bike paths in 2025, but since few scooters use the paths, more data is needed before deciding they're as safe as bicycles.
Leaving a page to open new tabs and check who made it and what other sources say about it and its claims.
7A memoir describes a conversation from 30 years ago word for word. Is the memoir credible? Is that dialogue reliable? Explain the difference.
The author is credible about their own life and feelings, but word-for-word dialogue from 30 years ago is probably reconstructed, so it's less reliable as an exact record. Credibility (the source) and reliability (the specific information) are different.
More practice: warm-up
1What does peer-reviewed mean?
Checked by other experts before publication.
3Which question asks Does this matter for MY question?: credibility, reliability or significance?
4What does corroborate mean?
To confirm with another independent source.
5Name one sign that a source might have a purpose that affects its credibility.
Any one: it sells a product; it's run by a group that wants a certain outcome; it has ads or discount codes; it's anonymous.
More practice: on your own
1A climate article on a well-known science magazine's site is from 2009. Assess credibility and reliability.
Credible source (established science publisher). Reliability may be limited because it's old: newer data and research may have changed the findings. Check for a recent update.
2A website looks very professional, with charts and photos. Why isn't that enough to trust it?
Anyone can make a professional-looking site. Appearance isn't evidence. You need to check who made it, their purpose and whether other credible sources confirm the information (lateral reading).
3In historical fiction about the 1998 ice storm, how could you check the story's reliability?
Compare its historical facts (dates, places, effects of the storm) with non-fiction sources such as news archives or government reports, and read the author's note. Invented characters are fine; historical events should be accurate.
4Two sources disagree: a 2026 government report and a 2026 advocacy group's report. How do you decide what to conclude?
Compare their evidence and methods, their purposes and whether other independent sources corroborate either one. Conclude carefully, noting disagreement if it remains.
5Give an example of a story detail that is significant and one that is not very significant, from any story in this unit.
Sample: In Do Not Open Until Spring, the greenhouse tomatoes are significant (they foreshadow the seeds and the family history). Ari's search returning millions of results is less significant (it adds realism and humour, not the main meaning).
Challenge
1Write a full conclusion (4 to 5 sentences) to the e-scooter research question that uses at least three of the sources appropriately.
Look for: Source A as the main evidence (local, recent, data, admits limits); Source D for rules (helmets, beginners), with its different context noted; Source C as a sign of public concern, not evidence of risk; Source B dismissed or noted as biased; a qualified recommendation (for example, a trial with speed limits and review).
2Explain how a source can be credible but not reliable on a particular claim. Give an example.
A credible expert can still be wrong or outdated on a specific point. Example: a respected doctor's 1990s book gives advice that later research has changed. The author is credible, but that specific information is no longer reliable. Always check date and corroboration.
3A friend shares a video of a bear wandering a Toronto subway platform. Plan three lateral-reading steps you'd take before believing or sharing it.
(1) Search for the event in reliable news sources (major Canadian news outlets, the transit agency's official accounts). (2) Do a reverse image or video search to see if the clip was posted earlier, elsewhere or edited. (3) Check who first posted it and whether that account is known for satire, ads or fakes. Conclude only once independent sources confirm it.
Quiz
1. Which question asks about reliability?
2. A company's blog says its product is "100% safe." The biggest problem is...
3. A peer-reviewed study from another country in 2019 is credible, but may be less...
5. Which conclusion best matches mixed evidence?
6. In a short story, a significant detail is one that...
What this lesson teaches: Grade 9 students analyze complex literary and informational texts by assessing the credibility, reliability and significance of information and formulating conclusions (C3.3). They practise research skills that weigh accuracy and credibility and watch for misinformation and curated content (A2.3).
How to help at home:
- When someone shares a surprising claim, ask together: "Who says? How do they know? Who else says so?"
- Model lateral reading: when you look something up, show your teen how you check the source in a new tab.
- Praise qualified conclusions (probably, in most cases) over absolute ones.
Common difficulties:
- Treating credibility, reliability and significance as the same. An expert source can still be outdated or off-topic.
- Trusting design or popularity. Professional looks and likes aren't evidence.
- Dismissing all personal stories. Anecdotes aren't proof, but they can show concerns worth investigating.
Online safety: Supervise the fact-checking activity; avoid pop-ups and sites that ask for personal information.
Facts used: All four e-scooter sources, the town of Pine Ridge and the company ZipGo are invented for this lesson; their numbers are not real data.