{"id":"life-par-school-lunch-account","audience":"parents","category":"everyday-life","track":"life","technique":"examples","title":"Figure out how much to add to a school lunch account","free":false,"task":"Your son's school lunch account is negative, and you want to cover the balance plus the next 20 lunches. Get exactly 3 numbered lines in plain text, under 60 words: 1. the cost of 20 lunches at the new price, with the math; 2. the deposit needed to also clear the negative balance, with the math; 3. the deposit deadline to avoid the fee. No other advice. Write a prompt that gets you exactly that.","materialLabel":"The school's notice (attached to your prompt automatically)","material":"PINE HILL ELEMENTARY - LUNCH ACCOUNT NOTICE (fictional)\nStudent: Marcus Bell | Grade 2\nDate: November 5, 2026\n\nCurrent balance: -$8.50\nLunch price: $3.25 per day\nMilk only: $0.60\n\nAccounts that are below zero on November 21 will be charged a $5.00 low-balance fee. Deposits can be made online at pinehillpay.example or by check to the school office.\n\nPRICE UPDATE (district letter, Nov 1): Starting November 10, the student lunch price is $3.50.\n\nMY NOTES\n- He buys lunch every day. Brings his own milk? No, milk is included in lunch.\n- My sister says to apply for free lunch, I'll look into that separately.\n- I'd like to cover the next 20 school days of lunches.","rules":[{"type":"numberedItems","count":3},{"type":"maxWords","max":60},{"type":"plainText"}],"mistakes":[{"title":"Using the old price","why":"The AI uses $3.25 from the notice and misses the district's update.","fix":"Add: \"Use the new $3.50 price.\"","checks":["r0","r1"]},{"title":"Forgetting the negative balance","why":"The AI covers 20 lunches but leaves the account below zero.","fix":"Add: \"Also clear the -$8.50 balance.\"","checks":["r1"]},{"title":"No math shown","why":"The AI gives totals with no working, so you can't check them.","fix":"Show it: \"1. 20 lunches: $3.50 x 20 = $70\".","checks":["r0","numberedItems"]},{"title":"Getting extra advice","why":"The AI adds tips about free lunch programs or packing lunches.","fix":"Add: \"No other advice.\"","checks":["r2","plainText"]},{"title":"Trusting the AI to count words","why":"AI is bad at counting. Ask for \"under 60 words\" and it often lands well over.","fix":"Cap each part: \"each line under 14 words.\"","checks":["maxWords"]}],"promptHints":[{"label":"Uses the new price","patterns":["3\\.50","new price","update"]},{"label":"Clears the balance","patterns":["negative","8\\.50","balance"]},{"label":"Shows the math","patterns":["x\\s*20","show.{0,15}(math|work)","\\+"]},{"label":"Sets the number of lines","patterns":["\\b(3|three)\\b.{0,20}(lines?|numbered|items?|steps?)"]},{"label":"Sets a word limit","patterns":["\\d+\\s*words","word (limit|count)"]}],"hint":"Tell the AI which price is current, that the negative balance counts too, and show it one line of math.","rubricLabels":["Line 1 gives 20 lunches as $70 using the new $3.50 price ($3.50 x 20), not $65","Line 2 gives the deposit as $78.50 ($70 + $8.50 to clear the negative balance)","Line 3 says to deposit before November 21 to avoid the $5.00 fee, and the answer gives no other advice"]}