Good bass exercises

good luck on the jazz band, its a great thing to do in highschool! for exercises on any strignd sintrument I recommend the chromatic and whole tone scales as they'll walk you allover the fingerboard. I als recommend you take a normal major and minor scale and practiece 'inverting it'... its a 2 steps forward, 1 step back sort of thing, so in a major scale you wuld go 1, 2, 3, 2, 3, 4, 3, 4, 5, 4, 5 , 6, 5, 6, octave....in triplet time, then reverse back down. Its good for your coordination and you'll hear tphrases like that in a lot of rock and jazz solos...

last but not elast, you're game you can do major scale variiations like 2 and a half octave majors (look them up), these scales will take you well out of your starting handposition as you climb the scale. You cna also take any scale and change your hand position so you can begin the scale after the 1, so for eveyr note on say a G major scale you cna start at that note so first you begin it on G, the second time you begin on A, then B etc. There's probably diagrams online for this sort of thing...