Staff — add, PIN, activate

`Add teacher`

What it is — The add form: Teacher name (e.g. “e.g. Melody R.”), PIN (4–6 digits), and Start date (new hire). Tap Add teacher.
How to use it — Give a name and a 4–6 digit PIN. Set the start date for a new hire so payroll doesn’t pay her for days before she started (leave it blank for an existing teacher). Success shows “✓ Added — they can log in now.”
Checks — “Enter a name.” and “PIN must be 4–6 digits.” guard the form; a duplicate active name is refused (add a last initial).

Reset PIN — Opens a small field for a new 4–6 digit PIN plus a Save button; on success it briefly reads “PIN updated ✓”.
Deactivate — Records her last day so payroll stops paying her every future period. (The Schedule drawer’s “Ended on” is where you fine-tune that date.)
Reactivate — Brings a teacher back and clears her end date; it asks you to confirm, and reminds you to set a return date so she isn’t paid for the time she was away.