You won't find many full lessons on the net, not for this kind of stuff. Not good lessons anyway. My teacher taught me about modes, progressions, walking, etc...But then he's a jazz freak, so...
For general jazz theory:
http://www.petethomas.co.uk/jazz-theory.html
For modes and scales:
http://www.outsideshore.com/primer/primer/
For chordal theory, general theory, including classical:
www.musictheory.net
There aren't many tutorial sites for jazz bass out there. I'd recommend learning arpeggio positions, modal positions, and the names of ALL the notes on the fretboard. It's not easy, but it's **** rewarding.