Yeah that's great advice. I teach guitar more than bass (just seems to be more work for it) so it's a little different, but most of the approach is the same.
My loose guide to approaching your students, from the start:
1) assess their playing ability. What can they do, what they can't, and find out what they want to do. Get them to play something; most of the time they're pretty hesitant to but encourage them to do so and use positive reinforcement to build rapport and their self esteem.
2) assess their technique and point out what they're doing well and what they have to improve upon. Explain why they need to improve and the benefits so they in turn understand the reasons why you'll keep pulling them up on correct technique for the 100th time.
3) ask them if they can play any other instruments. A few times I've had beginner bassists who were grade 8 violin or piano, or have played cello or flute etc or drums. Any previous musical experience, skills and knowledge is all beneficial to their learning process.
4) I ascribe a lot to the motto "you can put a kid in school, can't make him learn/lead a horse to water can't make it drink" with my teaching, so go in a direction they have some interest in. Sometimes they can be pretty picky so you kinda have to persuade them and put things in front of them. If they're young, find material they'll think is cool to play so they can impress their mates. Sometimes I'll ask if they've played Guitar Hero, though more often than not it's the other way around. Kids love that.
5) keep in mind where they are in their playing and encourage them that what may be hard now, you once found it just as difficult yet through practice you can now play it with ease. Make them understand if they practice daily they too will achieve similar results. You've got to keep practice in the forefront, in my experience anyway.
6) use correct terms for everything and always pick them up on poor technique. If they make the odd mistake here and there let it pass, but if they start making the same mistake, stop and go back through very slowly, identify why they're making the mistake and what they must do to overcome it.
7) above all, try to keep it fun whenever possible. Some aspects are tedious, like theory for a lot of people, but give them the information, guide them through it and then find something that's relevant to them incorporating the theory so it has some 'real world' application for them.
These are all just thoughts and things I've picked up over the past few years, and I'm always learning about music and how to present it better as often as I can. So if anyone has anything to add, I'd be more than happy to hear it
