Getting past 'I don't know' matters. If we can't get students' ideas out into the open - if we can't help them to verbalise the thoughts whizzing about in their minds - then we can't help them to think better, more deeply and more creatively.As teachers, we need access to students' thinking. It's through this access that we can diagnose the current position of their knowledge and understanding. It's through this that we can critically assess how they...