The ending....*spoiler*
I had some interruptions during this film so I missed some...
Just to see if I got it right: The schoolmaster was having an affair with one of the students, got her pregnant, and she tried to burn down the school?
The other victims knew about the affair too so he killed them also?
"I'd say this cloud is Cumulo Nimbus."
"Didn't he discover America?"
"Penfold, shush."