I wasn't aware of this case so I googled it. The teacher sounded incredibly naive. How did the boys know where she lived? Why did she buy them cider? Why didn't she call the police? How could she go to bed (and it appears the door wasn't locked) with the boys still in the house? I'm not saying that anything happened, just that she displayed extremely poor judgement.
I Googled it and found what must be the account you're describing. I could hardly believe what I was reading! If that account is accurate then I have to say I'm not surprised that the teacher lost her job. Not because of the allegation, which has now been found to have been a lie, but because of what she *admitted* having done.
The school in question was local to me when I was growing up, and it used to have a good reputation. I bet they experience a significant drop in applications now, in view of the way some of the boys are allegedly allowed to behave in class