Prepare a Parent-Friendly Concept Link

ROLE: Act as a teacher preparing a plain-language maths explainer for a parent.

CONTEXT: A parent of a [CLASS] learner wants to understand [CONCEPT] in [LANGUAGE] without seeing private attainment data.

INPUTS — FILL EVERY PLACEHOLDER:
- [CLASS]
- [CONCEPT]
- [LANGUAGE]
- [EVERYDAY CONTEXT]

SOURCE-BOUND TOOL FACTS AND EXACT URL WHITELIST:
- [CHATGPT] Whitelist template: https://chatgpt.com/?q={ENCODED_PROMPT}. It prefills but does not auto-submit, can lose the query in a phone app, and should stay under 1,800 characters; tell students to open it in a browser and never include personal data.
- [KHAN_ACADEMY] Whitelist: https://www.khanacademy.org/search?page_search_query={ENCODED_KEYWORDS}. Use search only; never invent opaque Khan topic or exercise paths.

DO THIS:
1. Write a compact source prompt that explains the idea before using notation.
2. Use one neutral everyday example and define every specialist word.
3. Add two questions the parent can ask without teaching a shortcut.
4. Create a ChatGPT source-bound ?q= link under 1,800 characters.
5. Say the link prefills but does not auto-submit and should be opened in a browser, reviewed, and sent.
6. Add a vetted practice-search link rather than inventing a direct exercise slug.

WORKED LINK EXAMPLE — COPY THIS EXACT ENCODING PATTERN:
Example task: Explain rank versus percentile to a parent using a class-of-100 example.
Expected result or check target: The explanation distinguishes position from percentage below a score and supplies two neutral check questions.
check this yourself
CHECK → https://www.khanacademy.org/search?page_search_query=percentile%20rank%20explanation
(paste-fallback: percentile rank explanation)
Encoding note: Each space is encoded as %20, so the decoded Khan search query matches the fallback exactly.

OUTPUT FORMAT:
1. Parent Prompt — exact generic prompt
2. Prefill Link — raw ChatGPT URL
3. How to Open — browser, review, press Send
4. Conversation Starters — two questions
5. Extra Practice — approved search link and fallback

QUALITY AND TOOL GUARDRAILS:
- Never encode a child's name, rank, marks, diagnosis, or school identifier.
- ChatGPT ?q= is a prefill route only and may be dropped by an installed app.
- Keep the encoded link under 1,800 characters and include a copy-paste fallback.
- Use Khan Academy search only; never invent a topic or exercise slug.
- Never diagnose learning needs from a parent description.
- Copy every [PLACEHOLDER IN SQUARE BRACKETS] character-for-character in every template, code block and translated variant.
- Never output a desmos.com URL with parameters, a mathsolver.microsoft.com URL, an invented GeoGebra material ID, an invented DIKSHA code, an invented Khan topic path, or an unlisted quiz or simulation slug.
- Never describe an AI answer as verified. Every external check must be labelled “check this yourself” for the teacher or student to inspect personally.
- Do not invent exam facts, source citations, marks distributions, tool IDs or inaccessible links. Separate mathematical proof from computational checking.

=== TOOL-LINK OUTPUT CONTRACT — follow every rule exactly ===
1. You may output clickable links ONLY to: wolframalpha.com/input?i= · symbolab.com/solver?query= ·
   geogebra.org/graphing|geometry|3d|cas?command= · math.stackexchange.com/search?q= · oeis.org/search?q= ·
   artofproblemsolving.com/community/q1_ · khanacademy.org/search?page_search_query= ·
   overleaf.com/docs?encoded_snip= · latex.codecogs.com/png.image? · docs.google.com/forms/...viewform?usp=pp_url
   (Forms only with entry.N IDs I paste in) · plus any URL I give you or that appears in this prompt's whitelist table.
2. NEVER output: desmos.com links with query strings (they load blank), invented geogebra.org/m/ IDs, Khan topic
   URLs, DIKSHA dial codes, Wolfram quiz/demo slugs not in my table, or mathsolver.microsoft.com (dead site).
3. Write queries in plain calculator syntax (x^2, sqrt(x), pi, 3/4) — never LaTeX — EXCEPT Overleaf and CodeCogs
   payloads, which are LaTeX.
4. Percent-encode the query part: space→%20, +→%2B, ^→%5E, =→%3D, [→%5B, ]→%5D; in LaTeX payloads also
   \→%5C, {→%7B, }→%7D, %→%25, #→%23, &→%26, newline→%0A. GeoGebra ?command= exception: encode ONLY + as %2B;
   leave ( ) = ^ ; as typed.
5. One link per line, formatted exactly:  CHECK → <full raw URL>   (no markdown brackets, nothing after the URL).
6. Directly below every link, print:  (paste-fallback: <the un-encoded query or commands>)
7. Before printing any link, silently decode your own URL and confirm it reproduces the query character-for-character;
   rebuild it if not. If a URL would exceed 1,800 characters (Overleaf: 6,000), print only the paste-fallback.
8. Label every link "check this yourself" — never claim the link proves your answer is correct.
9. On phones these links must be opened in a browser, not an installed app — say this once at the end.