+1 to all above. To a new player or someone coming to some theory ideas they cannot appreciate the idea of Cycle of 4ths and 5ths because they will not learn, or have not learned the theory that supports it. They learn the positions on the neck, and that is great because they learn the idea of transposing music at will, just change the position of the first note played and keep everything relative to that as a shape and it will all sound the same...but in a new key.
But for me I have had some great fun and some real leaps with students as to what the cycle of 5ths is about from a construction point of view.
If you can construct scales, you can construct chords, then you can use those chord tones to play with, interact, or harmonise with other notes, keys, or chords. It's called Tetra Chord Theory, it's a great lesson on a way to construct scales, but it also reveals how using 5ths in a cycle works, it is not just a random number, as well as 4ths, again not a random number.
I personally had this lesson before any theory work on scales, chords etc began.
Sure I played and practiced scales and such, but once their interaction was to be explained I got Tetra Chord Theory first....as a game and a puzzle to work out, then my work was checked to see how I interpreted the information, then we went from there.
Because I had a grounding in the construction, and the fact I was being taught music from an orchestral approach, ( i was nine years old, playing bass was years ahead of me..not even thought about at this point LOL ) my teacher could set a question, then leave it to us to work it out.
Sometimes she would get on with other students, set up lessons, even go out the room and just leave us. Sometimes it would take days to get one idea right, she would look at the answer and just say " not right, try again".
Looking back as I do, I see what was happening, not at the time mind you, she was making us work it out by seeing what we had learned. By making us use what we learned we can work it out, if we cannot, then we have,
a/ not learned or done the work set for us.
b/ we have not understood the work set for us.
So she used her experience to decide if we could eventually work it out or if we would genuinely never get it, in that case she would know what part we are missing by the way we are making the mistakes and not getting the correct answers. So the missing info was targeted, rather than repeat the whole lesson again we would get specific ideas to use that would help with the bit we were struggling on. That info would never be the same for each student, because it is using our own experience to relate the information to.....so a highly personal and individual approach to each players needs.
So my lessons supported ideas, miss out on one idea, or not fully understand it, and It will compound on laters ideas and lessons to make them harder or even confuse and in the end frustrate us, lead to apathy and feeling of being overwhelmed and quit.....or just not see the point of learning.
Check out the link, it a recent discussion on scales, and see if it helps make sense of Cycle of 5ths ( and 4ths). Check out the last page if you cannot be bothered to read it all.
It looks long but really it is just one simple idea repeated in each example, once you have the idea, then a pen and paper will see you work it all out with no bass needed....which is what theory is about.....the instrument is just the application of it, so you play what you have learned once it is in your head, you do not try learn and play at the same time, another great lesson for the future, learn the idea and understand it first, then work on the application....so much easier.
See it as a bit of fun, like a cross word puzzle or a fun puzzle that you find in papers and magazines.
http://www.talkbass.com/forum/f22/scales-necessary-896246/index6.html#post12886626