I do think that the introduction rather speaks about the importance of cognitive psychology rather than the importance of teachers knowing the brain.
“Cognitive psychology and neuroscience have begun to dissect the neuronal mechanisms of literacy using brain-imaging techniques. During reading acquisition, our brain circuitry recycles several of its pre-existing visual and auditory areas in order to reorient them to the processing of letters and phonemes. The nature of this “neuronal recycling” process helps explain many of the children’s difficulties in learning to read. Our growing understanding of the child’s brain has important consequences for how education should be optimally organized.”