{"id":"sheet-col-final-exam-score-needed","audience":"college","category":"spreadsheets","track":"data","technique":"context","title":"Work out the final exam score you need, with the math","free":false,"task":"You want at least an 80 in Stats 101, and the professor changed the grade weights in Week 6: homework 20%, midterm 30%, project 10%, final 40%. Write exactly 3 numbered lines showing the math: So far: (points earned from each graded part), Needed: (the final exam score you need) and Check: (plugging that score back in to show it makes 80). Plain text, under 80 words.","materialLabel":"Your grades and the syllabus (attached to your prompt automatically)","material":"STATS 101 - my grades (gradebook export, Nov 5)\n\nCategory | My score\nHomework average | 90\nMidterm | 70\nGroup project | 90\nFinal exam | (not taken yet, Dec 12)\n\nFrom the original syllabus (August):\n\"Grade weights: Homework 20%, Midterm 30%, Final exam 50%.\"\n\nWeek 6 announcement from Prof. Adeyemi:\n\"I've added a group project worth 10%. The final exam is now worth 40%. Homework and midterm weights stay the same.\"\n\nGrade cutoffs: A 90+, B 80-89, C 70-79.\n\nMy notes: I need a B to keep my scholarship. My roommate said I need an 82 on the final.","rules":[{"type":"numberedItems","count":3},{"type":"maxWords","max":80},{"type":"plainText"}],"mistakes":[{"title":"Not saying the weights changed","why":"The AI uses the original syllabus weights and gets 82, like your roommate.","fix":"Add: \"Use the Week 6 weights: 20/30/10/40.\"","checks":["r1"]},{"title":"Not showing the math","why":"The AI gives one number you can't check.","fix":"Show it: \"So far: 90 x 0.2 = 18 ...\"","checks":["r0","numberedItems"]},{"title":"No check line","why":"Without plugging the answer back in, a wrong weight slips through.","fix":"Add: \"Check: plug the score back in to show it makes 80.\"","checks":["r2"]},{"title":"Long or formatted output","why":"AI adds a study plan and bold headings.","fix":"Add: \"Only the 3 lines, each under 22 words, plain text.\"","checks":["maxWords","plainText"]}],"promptHints":[{"label":"Gives the new weights","patterns":["week 6","40%","10%","new weights"]},{"label":"States the target","patterns":["\\b80\\b","\\bb\\b grade|a b\\b"]},{"label":"Asks to show the math","patterns":["show (the )?math","x 0\\.","working"]},{"label":"Asks for a check","patterns":["check","plug"]},{"label":"Asks for plain text","patterns":["plain","no bold","no markdown"]}],"hint":"Grade math is only as good as the weights you give it. Say which weights are current and ask for a check line.","rubricLabels":["The So far line shows 90 x 0.2 = 18, 70 x 0.3 = 21 and 90 x 0.1 = 9, totaling 48 points","The Needed line shows (80 - 48) / 0.4 = 80 on the final, using the new 40% weight (not 82 from the old 50% weights)","The Check line shows 48 + 80 x 0.4 = 80 (or 48 + 32 = 80), and there is no study advice or extra text"]}