Flams give drummers the means to thicken up the sound of any given note by adding a grace note alongside the main note. The grace note is played closer to the drum than the main note thereby striking the drum just before the main note producing a fuller sound than just a single note alone. Pay close attention to your stick heights when working on flams: the grace note is low and the main note is high. Likewise be sure that when you finish your flam that you are in position for a flam in the opposite hand. Take your time with this exercise as it is a challenge to keep track of the opposing stick heights.