lesson
A search engine uses an index
1 · Learn
A search engine gathers information about many pages and builds an index that helps match queries with results. It does not necessarily examine every page freshly at the moment you search.
An index can be incomplete or out of date. A page may change after it was indexed. Search results are a starting point for checking sources, not a guarantee that every result is accurate or suitable.
2 · Worked example
I distinguish a short result snippet from the full page. The snippet may omit context or reflect an earlier version.
3 · Your turn
Does a search result prove the page's information is current and correct?
Check your answer
No. Check the actual source, date, context and corroborating evidence with adult guidance.
4 · Apply your learning
Model an index using six invented page cards and keywords. Compare what your index finds with the content on the cards.
Adult guidance and safety
Use adult-approved offline or school-managed tools, invented data and original media. Keep projects private unless sharing is explicitly approved. Paper traces support, but do not replace, practical programming and saved digital work. No real passwords or personal records belong in these exercises.
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