OK, bear in mind that I am just a guy on a message board and I could be full of crap. Also, bear in mind that I have had pretty good results with the more traditional 3 x hard session per week (especially if you just look at my stars). With the traditional 3 quality sessions per week method, I had an athlete earn 3rd place in the 5k at the USA junior championships (year 2000, female). Having said that, I think that for young runners, I am much more comfortable with the approach I have been using the last couple of years.
There are a couple of points I would like to hit on from your previous post:
#1 I use 6 days of training with my athletes, but many of them end up with an extra day off in there. I don't see a problem with a 12 year old, training age of 1, only going 5 or even 4 days (especially if she is mixing hockey or other sports in there). I prefer to have a higher training frequency with less effort put into any on given session.
#2 Just train through the next 3 races. If your daughter does not hammer any of her workouts, but runs them controlled and within herself, she should have plenty of pop in her legs for the races. We don't really back off our training for any early season races....of course, you have much longer between these cross races and your track season than my runners would have between their early season races and their championships. If you want to taper down a bit more that is probably fine. There is plenty of time to go back and build a little base after the races are over. The one thing that you absolutely, positively must remember is DON'T DRASTICALLY INCREASE THE QUALITY in an attempt to "peak" for these races. Actually, don't do that...ever. It does not work. Your daughter will race totally flat.
#3 you can do your tempo/cruise interval sessions wherever you like. Doing stuff on the track is nice because it is easier for the athlete to feel the appropriate effort level when she is not slowing down for corners or adjusting for hills. If she likes 6 x 1000 at tempo effort, that is fine, you don't need to change. I thought I remembered you indicating that that workout was done at I pace, however.
#4 The run the day before the race isn't really a workout. It should be more like a warm up and some fast strides. I think it is a good idea to bring the heart rate up for a short period the day before a race. I don't have any science to back this up, but have had good results recently using an easy run that progresses to SS pace the day before a big meet. Last fall, the day before our state championship, the girl that I have been refering to ran the course in 21:30 (which was her race pace early in the season). She came back the next day with a 48 second PR at 18:26.
#5 I wouldn't worry too much about the SPEED ENDURANCE. Build the base, maintain R pace while gradually lengthening the rep length. Use I pace sparingly, but gradually lengthen the intervals. The first race in May should provide exciting results to build from. I'll use our build up for track season last spring and use different athletes as an example (since my really good girl plays basketball during the winter, she doesn't participate in our pre-season track program, so I can't use her as an example for this). Starting in December, after our athletes have recovered from CC season, we start building toward the start of our outdoor track season (meets start in march for CA HS). The program we followed was pretty similar to what I described above. I had one girl last year that followed our plan very prcisely. Age 16, training age 1.5. She had run the 400 and 800 during the 2008 season with an 800 best of 2:37 (an effort which left her wiped out for the rest of the day). After our pre-season conditioning, she opened up the 2009 season with a 2:35 in early march, in which she won her heat. She said the race felt like one of her easiest ever. We progressed her though the season and she ended up running 2:26 in early may. As a freshman in 2007, during her first competitive season, she ran lots of quality work and was only able to run 2:44 for 800, lots of quality her sophomore year only brought her down 7 seconds to 2:37, but the solid SS base in 2009 allowed her to open up the season with a 2 second PR and still have the mental energy to knock an additional 9 seconds from her PR. Now that I think about it, the girl ran PRs in every non dual meet of the season, running her PR at our league championship to take 2nd (at our section meet, she ran a bit slower, timed the peak wrong by 10 days...dang!)
Her pre-season looked about like the following
M: 20-30 min steady followed by a little I pace (3 x 600, gradually lengthening to 4 x 800 in march, all done at about 95s per 400)
T: 30-45 min easy + weights
W: 1 mile warm up, 2.8 mile tempo or some sort of cruise interval session, 1 mile cool down. We use more tempo runs in the winter because the temperature is more conducive to them. During the fall, the temperature is still in the upper 90s to low 100 degree range when we practice, so I have to break up the tempo's into cruise interval sessions
Th: Longer effort, up to 1 hr.
F: 20-30 minutes easy to steady + Game day (relays, ultimate frisbee, tag, soccer, crustaceans..I invented that one) that included a fair amount of fast running. This was also the day we did reps, if there weren't enough kids around to play a game. Reps started off at 150m in Dec and lengthened out to 300-400 by march. Total volume of reps was usually kept under 1600m
Weekend: one day off, one day easy