Lots of ways to vary, works best with 122-125 BMP (or slower depending on the fitness level of your class).
1-Start with right leg lunge forward then with same leg do a reverse lunge back, 4 counts total. Repeat 4-8 times.
2-With same leg pulse three counts to front and then do the reverse lunge back for a three count pulse. Repeat 4-8 times.
3-With same leg do the three pulse but instead of doing the reverse lunge backwards do a plyometric jump to switch leads and do the 3 pulses with the left leg forward and switch. Repeat switching leads 4-8 times.
4-Take out the pulse and just do the plyometric split lunges for 8, ending with the left leg in a front lunge.
Repeat entire sequence on left leg.
Have fun and thanks for all of your suggestions! Amy.