Speed Work with Run Club

Tonight I joined the run club at our gym for a speed workout. I was hoping to cover more miles and get a more continuous workout like the last speed workout I did with them (which was also my first) but it was still worthwhile and something I wouldn't have done on my own. I don't even know what to call the drills we did but Jake said they sounded like stuff he did in football off season. I won't even try to explain them here. There were probably 12 people in the group tonight and I was middle of the group fast. The leader ran behind me for 100 yards and analyzed my form. He said I need to keep my arms higher but otherwise my form looked good. Total mileage was 2.45 but that includes walking after each of our 100 yard runs (10-12 times). I want to believe that drills like this will make me faster. 5k on Saturday so I'm hoping to see some results!