Single strokes and double strokes are the two main options we have when it comes to moving around the drum kit. Each hand plays either once or twice.
Three or four strokes per hand is definitely possible (as well as useful) but not as important. So for now we are going to focus on singles and doubles. Plus, once you have nailed doubles, playing triples becomes a lot easier!
There are a ton of exercises you could use to get better at playing double strokes but the exercises below are some of my favourites. They are also straight forward to play and easy to remember.
The “A” column contains the right handed exercises and “B” the left — don't neglect starting with your left hand! In each exercise the doubles start one 16th note (or semi-quaver if you prefer) earlier. Play each pattern individually at first and once you've got the hang of that try moving between the exercises. For example, play ‘1a’ four times, then ‘2a’ four times and then ‘3a’ etc.
As I said, pretty straight forward!
PDF download: Singles And Doubles