"We now know that when students make a mistake in math class, their brain grows, synapses fire, and connections are made. This finding tells us that we want students to make mistakes in math class and that students should not view mistakes as learning failures but learning achievements. But students everywhere think this means they are not a 'math person.' We need to change this thinking by telling students that mistakes are productive."
– Jo Boaler (What's Math Got to Do With It? p. xviii-xix)