De La Valette raises a good point. Whilst I've never been inclined to teach my students to do a glide approach for every approach (especially in a C152 which can create a bit of havoc when the poor buggar sitting behind you on approach in his Chieftain is struggling to maintain separation), I do however advocate use of the Aircraft Handbook. With the exception of the above-mentioned traffic separation issues, provided no-one behind will be unnecessarily delayed - I sometimes find it hard to fathom why schools insist on teaching their students to come screaming over the fence as if they were trying to set a new speed record, when the handbook says a lower speed is apropriate. I would have thought that nobody knows the aeroplane better than the company who builds it, yet there are plenty of us out there who think they know better.
Sorry, I know this is detracting slightly from the original question, but I just want reiterate that Aircraft Handbooks are printed to be read, not just stuffed in the back seat pocket to satisfy regs.