Checking a source before you trust it
Four questions that filter most misinformation in under a minute.
The guide
Who wrote this, and can you find that person or institution somewhere else?
When was it written? In fast-moving subjects a five-year-old page can be confidently out of date.
What would the opposite claim look like, and is it mentioned? A page that refuses to acknowledge any counter-evidence is usually arguing, not explaining.
Can you find the same fact stated independently in two places? If every version traces back to one page, you have one source, not several.
For exam material, the National Examination Board and your own school are the authority — not a study website, and not an AI.