Jazz Solo Technique: the "3 to flat 9" pattern
The "3 to flat nine" (or "three to b9") soloing pattern is a widely used soloing tool in jazz. It can be used over any flat nine chord or a dominant that could also be treated as a flat nine dominant chord. It consists of moving from the third of the dominant chord, to the flat nine, by means of scale tones, chord tones, or simply skipping.
Here are a few exercies to get yourself familiar. It is important to practice these in all 12 keys!