Also called
rudiments. The
practice of them helps one to develop some of the
coordination required to play
percussion instruments well, though the rudiments are generally for
snare drum. If they're for something else, like
mallets, they're called
mallet techniques. Some
instructors will emphasize rudiments
right off the bat, and some will never touch on them at all.
Personally, I think it is
important to know them all, especially if you are a
percussion major in
college.