On lesson 25 you have a left hand drag followed by a right hand tap and a left hand tap. Again, work on the sequence first, using alternating left and right hand leads. Once you get the sequence down, focus on building speed and rhythm. This is a fun rudiment to play that you may have heard in a lot of music. It has kind of a march feel to it.
After a rudiment review on the snare, exercises 1 and 2 provide a couple examples of the rudiment by itself before exercises 3 and 4 add a lead in drum beat and use the rudiment as a fill. Those last two examples can be rather complicated, so take your time and play them slowly. You can also watch the video to see me play them in slow motion.
Learn how to play the dragadiddle #1 drum rudiment in the next drum lesson.