The authors share the results of a research project involving the use of mathematics to develop students' Numeracy General Capabilities. The current article delves into an example of a teacher supporting 'good habits of mind' through focussing on the Critical Learning Disposition of accuracy.

Whenever the author explains the brain to her second-grade students, the look on their faces is one of simultaneous fascination and relief. What caught her off guard was the relief. In retrospect, it makes pure sense. Of course it was a relief for them to realize that they could affect their brains and its abilities--that nothing was set in stone.…