{
  "Classroom copy": "1 October 2026",
  "Disclosure": "Completed records are constructed teaching data. Blank practical forms contain no readings.",
  "Teaching data": {
    "Requirements and predictions data": {
      "head": [
        "Design",
        "Tokens",
        "Added mm",
        "Trial 1 final °C",
        "Trial 2 final °C",
        "Trial 3 final °C"
      ],
      "rows": [
        [
          "H",
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          12,
          16,
          16,
          16
        ]
      ],
      "start C": 10,
      "room C": 22,
      "elapsed min": 15,
      "mass g": 100,
      "criterion max C": 16,
      "token max": 4,
      "thickness max mm": 15,
      "conditions": "100 g, start 10°C, room 22°C, 15 min. Final ≤16°C in EVERY trial; ≤4 tokens; ≤15 mm added thickness. Covered liquid water; cups/lids, mass, starting temperature, duration, exposure and reading procedure match within and across trials. Surroundings stay at the stated room temperature. No ice, phase change, active heating/cooling, direct sunlight or meaningful evaporative cooling. Each trial uses fresh samples. Accuracy is not supplied.",
      "provenance": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
      "disclosure": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
      "kind": "design_trials",
      "trial ids": [
        "1",
        "2",
        "3"
      ],
      "units": {
        "temperature": "°C",
        "time": "min",
        "mass": "g",
        "thickness": "mm",
        "resources": "fictional tokens, not money or energy"
      }
    },
    "Check the complete brief data": {
      "head": [
        "Design",
        "Tokens",
        "Added mm",
        "Trial 1 final °C",
        "Trial 2 final °C",
        "Trial 3 final °C"
      ],
      "rows": [
        [
          "A",
          5,
          18,
          15,
          15.5,
          15
        ],
        [
          "B",
          8,
          20,
          14,
          14.5,
          14
        ],
        [
          "C",
          9,
          18,
          13.5,
          14,
          13.5
        ],
        [
          "D",
          6,
          24,
          14.5,
          15,
          14.5
        ]
      ],
      "start C": 10,
      "room C": 22,
      "elapsed min": 20,
      "mass g": 100,
      "criterion max C": 15.5,
      "token max": 8,
      "thickness max mm": 20,
      "conditions": "100 g, start 10°C, room 22°C, 20 min. Final ≤15.5°C in EVERY trial; ≤8 tokens; ≤20 mm added thickness. Covered liquid water; cups/lids, mass, starting temperature, duration, exposure and reading procedure match within and across trials. Surroundings stay at the stated room temperature. No ice, phase change, active heating/cooling, direct sunlight or meaningful evaporative cooling. Each trial uses fresh samples. Accuracy is not supplied.",
      "provenance": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
      "disclosure": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
      "kind": "design_trials",
      "trial ids": [
        "1",
        "2",
        "3"
      ],
      "units": {
        "temperature": "°C",
        "time": "min",
        "mass": "g",
        "thickness": "mm",
        "resources": "fictional tokens, not money or energy"
      }
    },
    "A decision needs a priority data": {
      "head": [
        "Design",
        "Tokens",
        "Added mm",
        "Trial 1 final °C",
        "Trial 2 final °C",
        "Trial 3 final °C"
      ],
      "rows": [
        [
          "E",
          4,
          12,
          16,
          16.5,
          16
        ],
        [
          "F",
          6,
          18,
          15,
          15.5,
          15
        ],
        [
          "G",
          5,
          15,
          16,
          17.5,
          16
        ]
      ],
      "start C": 12,
      "room C": 24,
      "elapsed min": 18,
      "mass g": 100,
      "criterion max C": 17,
      "token max": 6,
      "thickness max mm": 18,
      "conditions": "100 g, start 12°C, room 24°C, 18 min. Final ≤17°C in EVERY trial; ≤6 tokens; ≤18 mm added thickness. Covered liquid water; cups/lids, mass, starting temperature, duration, exposure and reading procedure match within and across trials. Surroundings stay at the stated room temperature. No ice, phase change, active heating/cooling, direct sunlight or meaningful evaporative cooling. Each trial uses fresh samples. Accuracy is not supplied.",
      "provenance": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
      "disclosure": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
      "kind": "design_trials",
      "trial ids": [
        "1",
        "2",
        "3"
      ],
      "units": {
        "temperature": "°C",
        "time": "min",
        "mass": "g",
        "thickness": "mm",
        "resources": "fictional tokens, not money or energy"
      }
    },
    "Independent challenge · Record a proposal first data": {
      "head": [
        "Design",
        "Tokens",
        "Added mm",
        "Trial 1 final °C",
        "Trial 2 final °C",
        "Trial 3 final °C"
      ],
      "rows": [
        [
          "J",
          3,
          14,
          16,
          16,
          16.5
        ],
        [
          "K",
          5,
          19,
          15,
          15.5,
          15
        ],
        [
          "L",
          4,
          16,
          15,
          17,
          15
        ],
        [
          "N",
          6,
          18,
          14,
          14.5,
          14
        ]
      ],
      "start C": 11,
      "room C": 23,
      "elapsed min": 16,
      "mass g": 80,
      "criterion max C": 16.5,
      "token max": 5,
      "thickness max mm": 19,
      "conditions": "80 g, start 11°C, room 23°C, 16 min. Final ≤16.5°C in EVERY trial; ≤5 tokens; ≤19 mm added thickness. Covered liquid water; cups/lids, mass, starting temperature, duration, exposure and reading procedure match within and across trials. Surroundings stay at the stated room temperature. No ice, phase change, active heating/cooling, direct sunlight or meaningful evaporative cooling. Each trial uses fresh samples. Accuracy is not supplied.",
      "provenance": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
      "disclosure": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
      "kind": "design_trials",
      "trial ids": [
        "1",
        "2",
        "3"
      ],
      "units": {
        "temperature": "°C",
        "time": "min",
        "mass": "g",
        "thickness": "mm",
        "resources": "fictional tokens, not money or energy"
      }
    },
    "Independent challenge · Separate redesign evidence data": {
      "head": [
        "Design",
        "Tokens",
        "Added mm",
        "Trial 1 final °C",
        "Trial 2 final °C",
        "Trial 3 final °C"
      ],
      "rows": [
        [
          "J-sealed",
          4,
          14,
          15.5,
          16,
          17
        ],
        [
          "K-thin",
          5,
          17,
          15.5,
          16,
          16
        ]
      ],
      "start C": 11,
      "room C": 23,
      "elapsed min": 16,
      "mass g": 80,
      "criterion max C": 16.5,
      "token max": 5,
      "thickness max mm": 19,
      "conditions": "80 g, start 11°C, room 23°C, 16 min. Final ≤16.5°C in EVERY trial; ≤5 tokens; ≤19 mm added thickness. Covered liquid water; cups/lids, mass, starting temperature, duration, exposure and reading procedure match within and across trials. Surroundings stay at the stated room temperature. No ice, phase change, active heating/cooling, direct sunlight or meaningful evaporative cooling. Each trial uses fresh samples. Accuracy is not supplied.",
      "provenance": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
      "disclosure": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
      "kind": "design_trials",
      "trial ids": [
        "1",
        "2",
        "3"
      ],
      "units": {
        "temperature": "°C",
        "time": "min",
        "mass": "g",
        "thickness": "mm",
        "resources": "fictional tokens, not money or energy"
      }
    },
    "Meet every requirement data": {
      "head": [
        "Design",
        "Tokens",
        "Added mm",
        "Trial 1 final °C",
        "Trial 2 final °C",
        "Trial 3 final °C"
      ],
      "rows": [
        [
          "P",
          7,
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          13,
          13.5,
          13
        ],
        [
          "Q",
          5,
          21,
          14,
          14,
          14.5
        ],
        [
          "R",
          4,
          18,
          14,
          16,
          14
        ],
        [
          "S",
          5,
          18,
          14.5,
          15,
          14.5
        ]
      ],
      "start C": 10,
      "room C": 22,
      "elapsed min": 20,
      "mass g": 100,
      "criterion max C": 15,
      "token max": 5,
      "thickness max mm": 18,
      "conditions": "100 g, start 10°C, room 22°C, 20 min. Final ≤15°C in EVERY trial; ≤5 tokens; ≤18 mm added thickness. Covered liquid water; cups/lids, mass, starting temperature, duration, exposure and reading procedure match within and across trials. Surroundings stay at the stated room temperature. No ice, phase change, active heating/cooling, direct sunlight or meaningful evaporative cooling. Each trial uses fresh samples. Accuracy is not supplied.",
      "provenance": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
      "disclosure": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
      "kind": "design_trials",
      "trial ids": [
        "1",
        "2",
        "3"
      ],
      "units": {
        "temperature": "°C",
        "time": "min",
        "mass": "g",
        "thickness": "mm",
        "resources": "fictional tokens, not money or energy"
      }
    },
    "Fresh recheck · What if none qualifies? data": {
      "head": [
        "Design",
        "Tokens",
        "Added mm",
        "Trial 1 final °C",
        "Trial 2 final °C",
        "Trial 3 final °C"
      ],
      "rows": [
        [
          "U",
          5,
          14,
          15,
          15,
          15
        ],
        [
          "V",
          4,
          19,
          14,
          14.5,
          14
        ],
        [
          "W",
          4,
          16,
          14,
          16,
          14
        ]
      ],
      "start C": 10,
      "room C": 22,
      "elapsed min": 20,
      "mass g": 100,
      "criterion max C": 15,
      "token max": 4,
      "thickness max mm": 18,
      "conditions": "100 g, start 10°C, room 22°C, 20 min. Final ≤15°C in EVERY trial; ≤4 tokens; ≤18 mm added thickness. Covered liquid water; cups/lids, mass, starting temperature, duration, exposure and reading procedure match within and across trials. Surroundings stay at the stated room temperature. No ice, phase change, active heating/cooling, direct sunlight or meaningful evaporative cooling. Each trial uses fresh samples. Accuracy is not supplied.",
      "provenance": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
      "disclosure": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
      "kind": "design_trials",
      "trial ids": [
        "1",
        "2",
        "3"
      ],
      "units": {
        "temperature": "°C",
        "time": "min",
        "mass": "g",
        "thickness": "mm",
        "resources": "fictional tokens, not money or energy"
      }
    },
    "A proposal needs a relevant test data": {
      "head": [
        "Setup",
        "Water g",
        "Start °C",
        "After 15 min °C"
      ],
      "rows": [
        [
          "Old whole design",
          100,
          10,
          16
        ],
        [
          "New whole design",
          200,
          12,
          15
        ]
      ],
      "conditions": "Room 22°C; cups/lids and duration match, but water mass and start differ. One comparison, not repeated trials. Covered liquid water; cups/lids, duration, exposure and reading procedure match within and across trials. Surroundings stay at the stated room temperature. No ice, phase change, active heating/cooling, direct sunlight or meaningful evaporative cooling. Accuracy is not supplied.",
      "provenance": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
      "kind": "confounded",
      "units": {
        "temperature": "°C",
        "mass": "g",
        "time": "min"
      }
    },
    "Fresh recheck · Whole design or one feature? data": {
      "head": [
        "Paired trial",
        "Old final °C",
        "New final °C"
      ],
      "rows": [
        [
          1,
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          15
        ],
        [
          2,
          16,
          14
        ],
        [
          3,
          17,
          15
        ]
      ],
      "conditions": "Fresh matched 100 g samples starting at 11°C; 23°C room; 15 min. New design changes both seam overlap and layer count; all other conditions match. Covered liquid water; cups/lids, mass, starting temperature, duration, exposure and reading procedure match within and across trials. Surroundings stay at the stated room temperature. No ice, phase change, active heating/cooling, direct sunlight or meaningful evaporative cooling. Each trial uses fresh samples. Accuracy is not supplied.",
      "provenance": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
      "kind": "paired",
      "start C": 11,
      "room C": 23,
      "elapsed min": 15,
      "units": {
        "temperature": "°C",
        "time": "min",
        "mass": "g"
      }
    },
    "Later check · Changed requirements data": {
      "head": [
        "Design",
        "Tokens",
        "Added mm",
        "Trial 1 final °C",
        "Trial 2 final °C",
        "Trial 3 final °C"
      ],
      "rows": [
        [
          "X",
          4,
          16,
          14,
          14.5,
          14
        ],
        [
          "Y",
          6,
          18,
          13,
          13.5,
          13
        ]
      ],
      "start C": 10,
      "room C": 22,
      "elapsed min": 20,
      "mass g": 100,
      "criterion max C": 15,
      "token max": 6,
      "thickness max mm": 18,
      "conditions": "100 g, start 10°C, room 22°C, 20 min. Final ≤15°C in EVERY trial; ≤6 tokens; ≤18 mm added thickness. Covered liquid water; cups/lids, mass, starting temperature, duration, exposure and reading procedure match within and across trials. Surroundings stay at the stated room temperature. No ice, phase change, active heating/cooling, direct sunlight or meaningful evaporative cooling. Each trial uses fresh samples. Accuracy is not supplied.",
      "provenance": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
      "disclosure": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
      "kind": "design_trials",
      "trial ids": [
        "1",
        "2",
        "3"
      ],
      "units": {
        "temperature": "°C",
        "time": "min",
        "mass": "g",
        "thickness": "mm",
        "resources": "fictional tokens, not money or energy"
      }
    },
    "Later check · One new environment record data": {
      "head": [
        "Design",
        "Tokens",
        "Added mm",
        "Trial 1 final °C",
        "Trial 2 final °C",
        "Trial 3 final °C"
      ],
      "rows": [
        [
          "X only",
          4,
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          17,
          17.5,
          17
        ]
      ],
      "start C": 10,
      "room C": 28,
      "elapsed min": 20,
      "mass g": 100,
      "criterion max C": 15,
      "token max": 4,
      "thickness max mm": 18,
      "conditions": "100 g, start 10°C, room 28°C, 20 min. Final ≤15°C in EVERY trial; ≤4 tokens; ≤18 mm added thickness. Covered liquid water; cups/lids, mass, starting temperature, duration, exposure and reading procedure match within and across trials. Surroundings stay at the stated room temperature. No ice, phase change, active heating/cooling, direct sunlight or meaningful evaporative cooling. Each trial uses fresh samples. Accuracy is not supplied.",
      "provenance": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
      "disclosure": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
      "kind": "design_trials",
      "trial ids": [
        "1",
        "2",
        "3"
      ],
      "units": {
        "temperature": "°C",
        "time": "min",
        "mass": "g",
        "thickness": "mm",
        "resources": "fictional tokens, not money or energy"
      }
    }
  }
}