The Middle Number
Tap the smallest card first and line them all up on the shelf. When they stand in order, the middle one is the median — and the stretch from end to end is the range.
No score is kept. No points, no streak, no ranking — the only number anyone writes down is the one your teacher writes down, standing next to you.
Watching one first is a strong way to start.
- 1Pages read this week739512Order: · Median: · Range:
- 2Points in the game410286Order: · Median: · Range:
- 3Minutes of practice1511191317Order: · Median: · Range:
- 4Shells collected185310Order: · Median: · Range:
- 5Laps around the track201461810Order: · Median: · Range:
- 6Books on the shelf921351174Order: · Median: · Range:
- 7Stickers earned1681220101814Order: · Median: · Range:
- 8Cans for the food drive3156129181Order: · Median: · Range:
There is no right answer here. It only tells your teacher where to start next time.
You found all eight middles.
The median is only the middle after the numbers stand in order. Line them up first — then the middle number and the stretch both show themselves.
The stretch is a choice. Taking it — or leaving it for another day — are both strong moves.
One row goes: how many you did, how many hints, your confidence, and the name you type below. Nothing else — and nothing goes until you tap the button.
For the teacher — this device only
One probe row, built from what happened on this screen. Nothing is sent anywhere — copy it into the Goal Builder yourself, or print this page. Independent means ordered the cards and found the range with no hints; supported means done after a hint. Both are real evidence and neither is a grade.
- Date
- —
- Skill
- Order a data set; find the median and the range
- Measure
- Trials (x of y)
- Independent
- 0 of 8
- Supported
- 0 of 8
- Hints used
- 0
- Confidence
- —
- Watched the demo
- —
- Stretch
- —
Items 1–5 line up five cards, items 6–8 line up seven — always an odd count, so a true middle card exists. Set 2 and Set 3 are the same skills with different numbers, so the same student can be probed three weeks running without being measured on memory.
Posts the probe row above — and nothing else — to the connected Sheet. It never sends by itself. Sending twice makes two rows, so Send again is a deliberate act.