Our training basically consisted of having the new teller dive right in. Though when I trained, I started with explaining things & having them take notes to understand how things works. I had a binder of assorted items to help out the new teller. Then, to incorporate the cash drawer, I usually asked the new teller if they preferred to watch or dive right in. If they wanted to dive in, I stood right next to them & kept an eye on every transaction (the new teller worked off my Head Teller drawer). All of my tellers were on their own drawer in under two weeks.
We recently took on part-time tellers who were trained at our main office. If an office needed a full time teller, we've had the part-timers take those positions & no training was required on my behalf, so it has been at least probably 2 years since I've done training.
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Of all the things I've lost, I miss my marbles the most.