An editable spreadsheet.
", "help_url": "", "input_widget": "spread-sheet", "input_options": {"correctAnswer": "settings[\"correct_answer\"]", "hint": {"static": true, "value": ""}, "initial_sheet": {"static": false, "value": "disable_cells(settings[\"initial_sheet\"], settings[\"disable_ranges\"])"}}, "can_be_gap": true, "can_be_step": true, "marking_script": "correctAnswer:\nsettings[\"correct_answer\"]\n\nmark:\nif(sum(mark_ranges)=0,\n incorrect(),\n apply(mark_ranges)\n)\n\ninterpreted_answer:\nstudentAnswer\n\nrange_cells:\nmap(parse_range(ref),ref,values(settings[\"mark_ranges\"]))\n\ntotal_cells:\nlen(flatten(range_cells))\n\nrange_weights:\nswitch(\n settings[\"marking_method\"]=\"per_cell\",\n map(len(r)/total_cells, r, range_cells),\n // otherwise, mark per range\n repeat(1/len(range_cells), len(range_cells))\n)\n\nmark_ranges:\nmap(\n let(\n range_credit,\n sum(map(\n let(\n correctCellString, correctAnswer[c],\n correctCellNumber, parsenumber(correctCellString, notation_styles),\n studentCellString, studentAnswer[c],\n studentCellNumber, parsenumber(studentCellString, notation_styles),\n award(\n 1/len(cells), \n if(isnan(correctCellNumber) and correctCellString<>\"\",\n lower(correctCellString) = lower(studentCellString),\n abs(studentCellNumber - if(isnan(correctCellNumber),0,correctCellNumber)) <= settings[\"tolerance\"]\n )\n )\n ),\n c,\n cells\n )),\n message,\n switch(\n range_credit=0,\n if(len(cells)=1, \"This entry is incorrect.\", \"All entries in this range are incorrect.\"),\n range_credit=1,\n if(len(cells)=1, \"This entry is correct.\", \"All entries in this range are correct.\"),\n //otherwise\n \"Some entries in this range are correct.\"\n ),\n assert(len(cells)=0, add_credit(range_credit*w, \"{name}: \"+message)); \n range_credit\n ),\n [cells,w,name],\n zip(range_cells, range_weights, keys(settings[\"mark_ranges\"]))\n)\n\nnotation_styles:\n[\"plain\",\"si-en\"]", "marking_notes": [{"name": "correctAnswer", "description": "", "definition": "settings[\"correct_answer\"]"}, {"name": "mark", "description": "This is the main marking note. It should award credit and provide feedback based on the student's answer.", "definition": "if(sum(mark_ranges)=0,\n incorrect(),\n apply(mark_ranges)\n)"}, {"name": "interpreted_answer", "description": "A value representing the student's answer to this part.", "definition": "studentAnswer"}, {"name": "range_cells", "description": "", "definition": "map(parse_range(ref),ref,values(settings[\"mark_ranges\"]))"}, {"name": "total_cells", "description": "The total number of cells to be marked.
", "definition": "len(flatten(range_cells))"}, {"name": "range_weights", "description": "", "definition": "switch(\n settings[\"marking_method\"]=\"per_cell\",\n map(len(r)/total_cells, r, range_cells),\n // otherwise, mark per range\n repeat(1/len(range_cells), len(range_cells))\n)"}, {"name": "mark_ranges", "description": "", "definition": "map(\n let(\n range_credit,\n sum(map(\n let(\n correctCellString, correctAnswer[c],\n correctCellNumber, parsenumber(correctCellString, notation_styles),\n studentCellString, studentAnswer[c],\n studentCellNumber, parsenumber(studentCellString, notation_styles),\n award(\n 1/len(cells), \n if(isnan(correctCellNumber) and correctCellString<>\"\",\n lower(correctCellString) = lower(studentCellString),\n abs(studentCellNumber - if(isnan(correctCellNumber),0,correctCellNumber)) <= settings[\"tolerance\"]\n )\n )\n ),\n c,\n cells\n )),\n message,\n switch(\n range_credit=0,\n if(len(cells)=1, \"This entry is incorrect.\", \"All entries in this range are incorrect.\"),\n range_credit=1,\n if(len(cells)=1, \"This entry is correct.\", \"All entries in this range are correct.\"),\n //otherwise\n \"Some entries in this range are correct.\"\n ),\n assert(len(cells)=0, add_credit(range_credit*w, \"{name}: \"+message)); \n range_credit\n ),\n [cells,w,name],\n zip(range_cells, range_weights, keys(settings[\"mark_ranges\"]))\n)"}, {"name": "notation_styles", "description": "", "definition": "[\"plain\",\"si-en\"]"}], "settings": [{"name": "initial_sheet", "label": "Initial sheet", "help_url": "", "hint": "Aspreadsheet object giving the initial state of the sheet that the student should fill in.", "input_type": "code", "default_value": "", "evaluate": true}, {"name": "correct_answer", "label": "Correct answer", "help_url": "", "hint": "A spreadsheet object representing a correct answer to the part.", "input_type": "code", "default_value": "", "evaluate": true}, {"name": "disable_ranges", "label": "Ranges to disable", "help_url": "", "hint": "A list of cell or range references, denoting the cells that should not be editable.", "input_type": "code", "default_value": "[]", "evaluate": true}, {"name": "mark_ranges", "label": "Ranges to mark", "help_url": "", "hint": "A dictionary mapping names to cell or range references, denoting the cells that should be compared for equality with the expected answer.", "input_type": "code", "default_value": "dict()", "evaluate": true}, {"name": "marking_method", "label": "Marking method", "help_url": "", "hint": "", "input_type": "dropdown", "default_value": "per_cell", "choices": [{"value": "per_cell", "label": "Each cell has the same weight"}, {"value": "per_range", "label": "Each range has the same weight"}]}, {"name": "tolerance", "label": "Allowed margin of error", "help_url": "", "hint": "", "input_type": "code", "default_value": "0", "evaluate": true}], "public_availability": "restricted", "published": false, "extensions": ["sheets"]}], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"name": "PhET springs experiment", "tags": [], "metadata": {"description": "", "licence": "None specified"}, "statement": "\nSelect the Lab experiment.
\nChoose the strength of your spring. Keep the strength the same throughout the experiment.
\nMeasure the difference between the unstretched length and the resting position for a variety of masses, and enter your measurements in the table below.
", "advice": "", "rulesets": {}, "extensions": ["jsxgraph", "sheets"], "builtin_constants": {"e": true, "pi,\u03c0": true, "i": true}, "constants": [], "variables": {"raw_spreadsheet": {"name": "raw_spreadsheet", "group": "Ungrouped variables", "definition": "spreadsheet_from_base64_file(safe(\"spring.xlsx\"), 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"description": "", "templateType": "spreadsheet", "can_override": false}, "blank_spreadsheet": {"name": "blank_spreadsheet", "group": "Ungrouped variables", "definition": "slice(raw_spreadsheet,\"A1:C6\")", "description": "The spreadsheet with some rows added
", "templateType": "anything", "can_override": false}, "plot": {"name": "plot", "group": "Ungrouped variables", "definition": "jsxgraph(\n 600,600,[-25,110,310,-5],\n dict(map([\"p{i}\", [\"point\",[0,0], [\"id\": \"p{i}\", \"withLabel\": false]]],i,0..4)),\n [\"axes\":true]\n)", "description": "", "templateType": "anything", "can_override": false}, "k": {"name": "k", "group": "Ungrouped variables", "definition": "let(valid_entries, filter(not (isnan(x[0]) or isnan(x[1])), x, zip(masses,lengths)),\n sum(map(l/m, [m,l], valid_entries))/len(valid_entries)\n)", "description": "", "templateType": "anything", "can_override": false}, "masses": {"name": "masses", "group": "Ungrouped variables", "definition": "map(parsenumber(x,\"plain\"),[x],filled_spreadsheet[\"A2:A6\"])", "description": "", "templateType": "anything", "can_override": false}, "lengths": {"name": "lengths", "group": "Ungrouped variables", "definition": "map(parsenumber(x,\"plain\"),[x],filled_spreadsheet[\"B2:B6\"])", "description": "", "templateType": "anything", "can_override": false}, "filled_spreadsheet": {"name": "filled_spreadsheet", "group": "Ungrouped variables", "definition": "fill_range(blank_spreadsheet, \"A2:C6\",\n [\n [\"6\",\"1\", \"0.1666\"],\n [\"12\",\"2\", \"0.1666\"],\n [\"18\",\"3\", \"0.1666\"],\n [\"24\",\"4\", \"0.1666\"],\n [\"30\",\"5\", \"0.1666\"],\n ]\n)", "description": "", "templateType": "anything", "can_override": false}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": ["raw_spreadsheet", "blank_spreadsheet", "plot", "filled_spreadsheet", "masses", "lengths", "k"], "variable_groups": [], "functions": {}, "preamble": {"js": "", "css": "iframe.phet {\n width: 100%;\n height: 80vh;\n}"}, "parts": [{"type": "spreadsheet", "useCustomName": false, "customName": "", "marks": "0", "scripts": {}, "customMarkingAlgorithm": "masses: map(parsenumber(x,\"plain\"),[x],studentAnswer[\"A2:A6\"])\n\nlengths: map(parsenumber(x,\"plain\"),[x],studentAnswer[\"B2:B6\"])\n\npoints: map(plot[\"p{i}\"], i, 0..4)\n\npositions:\n map(vector(mass,length), [mass, length], filter(not (isnan(x[0]) or isnan(x[1])), x, zip(masses,lengths)))\n\njxg_input:\n flatten(map(\n [ jxg_show(p,not (isnan(mass) or isnan(length))),\n jxg_set_position(p, vector(mass, length))\n ],\n [p,mass,length],\n zip(points, masses, lengths)\n ))", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": false, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "settings": {"initial_sheet": "blank_spreadsheet", "correct_answer": "blank_spreadsheet", "disable_ranges": "[\"A1:C1\"]", "mark_ranges": "dict()", "marking_method": "per_cell", "tolerance": "0"}}, {"type": "information", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "{plot}
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