For example there are at least 40 parts to the move called, The Forward Stride . After teaching the parts, we now introduce one other elements, such as the puck. Technique blows up - at least for awhile. The brain must assimilate the added element and transfer this information to the muscles. Now we add another element, such as skating fast with the puck.
Technique blows up again.
Apply this building block process to all the hockey maneuvers and you ll understand why they years to teach and years to master. Then correctly and powerfully. Then correctly, powerfully, quickly. Then correctly, powerfully, quickly with the puck. Finally, correctly, powerfully, quickly with the puck, in game situations and under lots of pressure.