Practicing Scales - Part 1
It's much more fun to practice scales while playing to a jam track. If you're practicing the Blues Scale, then choose a Bluesy jam track, or even better, a Minor Jam track, this way if you accidentally step outside of the Blues Scale, or play a bent note out of tune (like the 3'), you'll know it right away. For the Major Pentatonic Scale use a jam track with a Light feel, like a Rhumba or Swing.
P.S., before doing this, play each scale slowly while playing the same notes on a piano, pitch generator or tuner, to make sure your bends are in tune.