Fantastic horror short

"I like the short and mysterious description. Your opening with the detailed yet cleared description of the teach is good. There are a couple of little mistakes with punctuation with speech but nothing major. Things soon escalate and you really feel the tension and emotion of the students. The change in point of view is very sudden and I think starting a new chapter would be better. The contrast between the crazy teacher calmly telling his students the about the boys and the pain and bloody suffering of the students is very shocking and affective. The bit where there is only one bullet left I think could be another place to start a new chapter. The student sending the touching message to his own brother while it is going on is really upsetting and it is refreshing to see you not going down the cliche root of ‘I wish I got to say this’ before I died. The ‘:’ later on in the story would be better as ‘;’. Over all this is a fantastic horror short story."