I worked in prison education until last Christmas; worked there for about 3 years. I worked as a Business Studies teacher initially and then as an Advice and Guidance worker.
The prison I worked at was all male. It was 50% Young Offender (17y-21y) and they could be from cat C up to cat A/Lifer. The other 50% were adults, mainly cat C. It was pretty high secrity due to the YOs we held.
I am not a hard person or anything. I had been teaching as a secondary school IT teacher before that, and left there because I found it tough.
There are lots of security things to bear in mind, but as a teacher you are never supposed to be alone with just one offender anyway, and most rooms have panic buttons, plus you can be issued with a personal alarm. In my advisor role I did do one to ones with the men, so had to have an alarm at all times.
You will be issued with some keys, but not access to everywhere. You won't lose them. They have to be attached by a big chain to your belt before you can go intot he main building. You collect them on the way in and hand them in ont he way out. In a closed prison you can't leave the buiilding with them as an alarm goes off.
I didn't find it scary or intimidating TBH. It was fine. Honest!
It can be a bit wierd when you are chatting at home later and talking of some nice lad you was chatting to and then suddenly realising he was in their for some nasty rape or murder. We had some very high risk offenders.
What specifically would you like to know?