Grade my workout for my high school team

also, when you say "distance group," it's a 1a. there would be a XC vs. TF tradeoff in accumulating many kids at distance at a tiny school. what i saw in 1a results the winning formula is turn out across events. if you do want to work on distance, keep it to maybe the 5 main kids for XC. the others i'd spread to sprints, hurdles, jumps, etc.

My question would be what is your training goal for this day that you're trying to accomplish with this workout?

While the workout is not terrible, I'm not sure it's as effective as it could be as you're mixing anaerobic threshold work targeting aerobic capacity (tempo section) with anaerobic capacity work with the two intensive tempo sections (the 800 and mile sections). Unless you have a specific training goal where there is a reason to combine those into one session, you'd be better off picking one theme for the workout and sticking with it as workouts are most effective when you stick to one clear training theme for the day. If combining the two themes into one workout, the overall volume is fine, but it's not really a sufficient stimulus to greatly benefit in either workout category.

Depending on where you are in your macro cycle and micro cycle this week, I would either do a tempo run/threshold effort for aerobic capacity or do and 800/mile intensive tempo workout to focus on anaerobic capacity. For a harder tempo run at threshold pace, I would try to make total volume around 15-20 min at Anaerobic threshold pace. I'd probably just do a straight tempo run at that pace unless your runners are too new or out of shape to handle that, then splitting into intervals with short recovery like you have here is fine. The 12 min total volume at tempo pace might be fine for newer very low mileage HS runners. If doing an intensive tempo session, then I might adjust what you have for the mile pace section to either 4x60 sec with 2 min recovery or 8x30 second w/ 1 min recovery. Then do 3 min between that and the 800 pace stuff w/ same volume as you have for the 800 pace section. I'd aim for roughly 800 m at 800 pace and 800 at mile pace OR 400 m at 800 place and 1600 m at mile pace for the session or equivalent running times.

Oops I just went back and read page one of posts and realized you are coaching very new low volume athletes. In that case, splitting the tempo into intervals if doing a tempo session makes sense for new runners, but if doing just tempo work for the day, I would still up the reps like like 15-20 min of total tempo time.