Power cleans are where an olympic bar is on the floor, grab it overhand and fling it up to the shoulders as if you were about to do a military/shoulder press, but don't press. Its half deadlift, half curl with body momentum. You'd probably be best off searching you tube for a good video.

Pendlay rows are just like normal rows except the bar comes into contact with the floor after every rep. Again, go to you tube if need be.