Ok, having taken on board some critique, I have edited and, hopefully, improved my explanation of the SOLO taxonomy. There are three main changes...
1. I have started at the end by talking about the big picture of a concept we are trying to learn and then broken it down rather than building it up from nothing. In order to clarify this, I have added some of the letters from the word CONCEPT.
2. I have changed the circles which represent individual ideas to hexgaons. I have done this for two reasons; firstly there is an implication that having multiple sides means you are able to make multiple connections (now you mathematicians who are about to shout me down and tell me that a circle has an almost infinite number of sides, please take it from me it does not, it has only two sides. An inside and an outside ;)) The other reason I have switched to hexagons is that one of my favourite activities to help externalise SOLO stages in learners' thinking is by using cut up hexagons or Triptico's excellent think link tool.
3. I have added another stage post extended abstract. Now this is not strictly speaking a lens through which we look at the complexity of a learner's understanding, it is actually just the idea that when we really understand a concept and have explored the possibilities, that concept may well retract (is this the right word?) and become an uni structural element of an even bigger concept. (Thanks to Kim McGillivray from JMSS for challenging me on this).
As ever, this is a work in progress and, as Darth points out, one must prototype and take feedforward to get things right, so any comments are welcome (as long as they are knd,specific and helpful...).