When dealing with hurdlers at the HS level, the total amount of hurldes run without soreness will determine much of the improvement. Many times coaches will set up the hurdles on the track and demand great runs but this should be done only when the athletes are of a level that their hurdle skills will allow for safe (read low impact) hurdling.
Things I look for and play with.
The wilbur ross drill is jumping over a hurdle with the arms horizontal and to the palms down. Sort of making a bar near higher then their belly button.
Take a cones with dowels or 31 inch hurdles and jump over them with straight legs and rapid knee drive while landing with very straight legs. To do this requires fast knees (touch the forearms) and good timing. This will program the fast leg (lead and trail) without hurdling (if you can't hurdle well errors creep from all directions like the movie aliens)
Then when they get good with knee drive you add the block with your arms and do the same thing. This drill can be then used for one stepping over two or more hurdles depending on their leg power and skill.
Sticks and bricks teaches step frequency and patterns. I like teaching 5 steps beween them to clean up strides. Basically your are taking a fast step over with hurdle arms and a quick Ross drill.
You can do this on grass or tracks and you can do 10-20 runs or so.
