For time:
50 Sit-ups
50 Double-unders
50 Sit-ups
Walking Lunge, 50 steps
50 Sit-ups
50 Burpees
50 Sit-ups

17 minutes, 50 seconds

I did 15 Burpees and found that it was hurting my right shoulder, so I switched to squats. Looking back, they should have been jump squats, but I'll have to leave that for next time.