How a Search Engine Searches

1. What your child learns and why

A search engine does not “read the internet” at the moment your child types. Before that, a robot program crawls pages by following links, and the search engine writes down in an index — something like a card catalogue — which words are where. The answer comes from the catalogue and is put in order by a program. Once children understand this, it is easier for them to accept that the first result is only the best match according to a program, not a guaranteed truth — and that it is worth checking another source.

2. Three questions for dinner

• “Do you think a search engine reads the whole internet while you wait? Then how does the answer come so fast?”
• “Why is the first result not necessarily the right one? How do we check?”
• “A search engine does not leaf through everything — it has a catalogue. And how do you find something you learned a week ago?”

3. 10 minutes together, no screen — a card catalogue

1. On 10 slips write one invented “page” each, with one sentence (a favourite animal, a dish, a game). No names, addresses or phone numbers. Number them.
2. On small cards make the catalogue: a word and the numbers of the slips where it appears.
3. One person says a word, the other looks only at the catalogue and says the numbers. Then compare: how many slips would you have read without it?

4. What success looks like

• Your child names the three steps: crawling, index, ranking.
• Explains to you, with the catalogue, why searching is fast and why a page nothing links to may not be found.

5. Common difficulties

• “A search engine knows everything” → “It only knows what the robot found and wrote down.”
• “The first one is the most correct” → “It is the best match according to a program. What other source can we ask?”

Say: “Let's find out together.” Avoid “that's a silly question”.

6. Safety

The examples in the lesson are invented and the pages are on paper. When you search online together, let your child show you what they typed. If something frightens them — “If something frightens you, tell an adult you trust.”

7. Where to go next

Before: DB-IB-04 “Ad or Truth?” · Next: DB-IB-06 “How AI “Guesses” — and When It Is Wrong” · Source of the search facts: Google Search Central.

You don't need to know the answer. Say: “Let's find out together.”