From what I read (1) Dietz advocates French contrast training, which consists of 4 exercises performed one after another:
- Heavy compound (80-90% 1RM)
- A plyometric jump
- A drop set or weighted jump (30% 1RM)
- Plyometric or accelerated plyometric
There is another simpler variation of this which uses only the two first exercises called complex training. From what I understand French contrast is best suited for advanced athletes and complex training best suited for medium advanced athletes.
I am guessing your athletes are not advanced but high school age kids?
If so complex training, that is pairing one heavy exercise with a plyometric variation of the same movement pattern, may be more appropriate (2), (4).
An example of such a complex pair (2) may be:
- 5 heavy back squats
- 3 minutes rest
- 10 box jumps
- 2 minutes rest
Repeat for a total of 3 sets (pairs).
Cal Dietz himself seems to be in favour of complex training:
"The complex and French contrast training is some of the most effective transfer from weight room methods to the field." (3).
(1) French contrast training for rapid gains in speed and power
(2) The Effects of Complex Training in Male High School Athletes on the Back Squat and Vertical Jump
(3) Interview with Cal Dietz: Complex Training and Accelerated Plyometrics
(4) How to Increase Power with Complex Training