Those of you slagging off the grammar/punctuation/handwriting - have a heart (parent of a DS with learning difficulties here). Writing doesn't come easily/naturally to everyone.
The boy handed the note to his mother so she had an opportunity to ask him about it - she didnt come across it by accident - so I think her "fear" of "finding him hanging" has been over-sensationalised for the purposes of the article.
Sounds like a valuable exercise for a 14-year old, and he was asked to imagine that he had a terminal illness, not that he was about to commit suicide! What he wrote was quite beautiful, I thought.