I help teach a beginner's class at the University of Houston.
Traditionally, classes were 1 hour, twice a week. We would cover footwork for the first half of the course, then bladework (foil) and tactics for the last half.
At the end of each semester we would have a beginner's tournament. Only beginner's with no prior fencing experince were eligible. The prize was a complete beginner's set (jacket, mask, glove, dry foil).
We usually have about 20-30 intially and can dwindle down to only 4 or we may even retain as much as 15. Retention rate for the following semesters remains small (only about 3 or 4 return, sometimes not including the winner of the beginner's tournament!).
The idea behind doing nothing but footwork before they can even touch a blade is to weed out the dedicated and the non-dedicated. Another, more practical reason is that the fencers aren't allowed to borrow weapons from the club until they've paid thier dues and signed in blood. We don't have them pay until about halfway through the class because we don't want them wasting money on something they'll hate (we're all poor college students, after all).
Just lately we've had a new beginner's instructor who's doing things a little differently. The students are given blades earlier and bladework is more intigrated along with the footwork. Classes are now 2 hours twice a week as opposed to 1 hour twice a week. So far, I haven't seen a difference in the rate of improvement or bad habits. I intially disagreed with the intigration but I find myself favoring it a bit more (though perhaps not as intense as it's been practiced).
