SpinKit随机数字转盘：转出 1–10、1–50 或 1–100
全场都能看着落地的随机数字生成器。
有时你需要一个随机数，而普通生成器显得平淡：一个按钮、一个数字，结束。数字转盘以公开方式完成同样的事——大家看着 1 到 30 扫过，并慢慢停在赢家上。对课堂、游戏夜、有编号票的抽奖，以及任何像宾果的活动，可见的旋转就是重点。
一分钟内做出数字转盘
- 打开 SpinKit 转盘。
- 粘贴数字，每行一个。技巧：在电子表格列中输入 1, 2, 3…，拖动填充柄向下，再整列粘贴进来。
- 旋转——每个数字获得相同扇区与相同机会。
选择合适的范围
- 1–10 或 1–20：非常适合转盘——扇区大、易读、转得快。
- 1–50：仍然好用；扇区变窄但仍可读。
- 1–100：转盘能应对，但扇区很细。可考虑转两次——一个转盘管十位（0–9）、一个管个位——或改用 Spin Sheet 抽取。
- 步长与自定义集合：数字不必连续。只要偶数、5 的倍数、你实际卖出的票号——粘贴符合现实的任何名单即可。
不重复：宾果模式
对宾果、摸彩和任何「抽到完」的游戏，打开旋转后移除赢家。每个抽中的数字离开转盘，池子缩小，不会重复——数字版的笼中抽球。旋转历史可兼作叫号记录；若要办正式游戏，还有完整的 宾果叫号指南。
独立抽取：保留重复
若每次抽取彼此独立——骰子式掷点、随机页码、为游戏回合选一个数——请关闭移除。同一数字连中两次虽不常见但完全公平；若移除数字，会悄悄扭曲剩余所有数字的概率。
转盘不合适的时候
需要 1 到 10,000 之间的数字，或一次上千次抽取？那是电子表格的领域：Spin Sheet 可从任意大小的名单抽取随机行并导出结果。转盘的价值在于有人在观看。
Inclusive ranges, and the 1–100 trap
Say the range out loud before you paste it. “One to a hundred” almost always means both ends count: ticket 1 and ticket 100 are real tickets. Spreadsheet fill handles are good at this; typing “1–100” into a chat and then pasting 1 through 99 is how raffles quietly lose a sold ticket. Count the slices. If you sold 87 tickets, the wheel should have 87 numbers — not a clean 1–100 with thirteen dead draws.
The same trap shows up in classrooms as “pick a page between 1 and 30”. If page 30 is the last page of the chapter, it belongs on the wheel. If you meant “a page we have actually read”, paste that shorter list. A number wheel is only as honest as the range you gave it.
Dice replacement — and when it is the wrong homework tool
A 1–6 wheel is a fine substitute for a missing die: big slices, a result the table can see, and no argument about a cocked roll. A 1–20 wheel does the same job for a classroom that is playing a one-shot and left the dice at home. Leave removal off. Independent rolls are allowed to repeat; a die that cannot roll 4 twice in a row is not a die.
Do not use a number wheel to “prove” a probability homework. The point of that work is usually a recorded sample from a stated generator, with the method written down. A theatrical spin is the wrong artefact. If the assignment wants 200 samples of a fair d6, a Spin Sheet column of 1–6 drawn with replacement, then exported, is the honest record. Use the wheel when the room needs to watch one number land — not when a spreadsheet of samples is the actual deliverable.
Number of the day, without turning it into a popularity contest
Primary classrooms often want a number of the day: a 1–20 or 1–100 that becomes the counting, place-value or times-table focus. Put the range on a saved wheel, spin once at the start, and leave the result on the board. If yesterday’s number should not repeat this week, turn removal on for the week and reset on Monday. That is a bingo cage for numbers, not a raffle — and it stops the same “lucky 7” arriving four days running while still looking fair to the class.
Keep the wheel on the device, not in a shared account the class can edit. Local-first means the register of remaining numbers lives where you spun it. If you need the same wheel on a second machine, copy it on purpose. A number-of-the-day that silently syncs from last period’s leftover list is how Thursday inherits Wednesday’s removals without anyone noticing.