Son "got" a plant from a teacher at school (well he got two) his
teacher's has died, the one he gave to next door is still alive and
pretty healthy but the one in his greenhouse is doing really well, it is
117CM tall (despite (because of?) getting pretty much ignored it is
doing better than next doors which is pretty much a house plant).
Thing is; he 'believes' it dies of every year, can anyone identify
the plant and how we would go about getting a cutting from it?
Instructions in words of one syllable please as I am no gardener and
son doesn't know any real terms.

http://www.sidtech.co.uk/iu/soup15528396654.JPG