To a large extent I would agree with Whirly, this may not even be how the instructor teaches it! How many instructors here have not shown a student something only to have him doing it a different way? Personally I show people the many different ways of putting things on a chart/plog,recommend what I think, and then let them do it to a large extent the way they feel comfortable with, Beagle criticises the half way mark, but what is the problem with this as long as it is not the only time marking he has? - what I do want to see though is that they apply the techniques properly - i.e. NOT map creeping but using timing and waypoints sensibly, recognising when they are off track and using a proper method to regain it etc.
n.b. maybe it is me, but I could not spot the heading errors Esperanza talks about, the only calculation error I could see was the groundspeed (how can you have 100kts TAS and 108kts GS with only 7 kts of wind) - and that was so small it was irrelevant, probably just reading it off the whizzwheel (though this does make me wonder if he does a gross error check - this should have picked this up).
I would also like to have seen a Max drift written down somewhere.