haha not all PDH teachers are dipsticks. my teacher is a really gud 1 but she pushed us quite a fair bit this term to get us on track, so we had heaps of work to cover, but nevertheless it was worth it i tell ya. but yea.. regarding to ur assesment,
Try and chose a sport that you are comfortable with.
for part 1.
session 1 u can chose like a sprinting drill follow by a passing drill to get the body motion going.
session 2 for me rugby league will be my choice so i wuld do stuff like gym training.
part 2 u can talk about why flexibility is important for ur sport, (rugby league flexibility is for passing and offloading while in a tackle) after this u mite want to show the people ur presenting some stretches and talk about what these stretches, such as these stretches, stretch the wateva muscle group.
hope it helped.. even tho i dont fink its really helpful ^^"