I’m posting this mainly so that I don’t lose it – I haven’t had a chance to read it yet. It sounds great: he advocates for a ‘rougher’ approach to maths and its use (excluding some contexts, obviously) so it can be more useful in everyday life. I find it really difficult to get my pupils to embrace what we do teach them (e.g. estimation when in the shops, geometry/measure/trigonometry for art and construction work, etc), so inspiration is welcome.
In an intriguing departure from most business models (although the author does explain his rationale in his New York Times interview), the book is available online for free.
I’ll update once I’ve had a dig through it – do alert us (via comments) if you read any and want to let us know which bits are worth reading or avoiding