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Sara Mead has more on the phony neuroscience and general quackery afflicting Leonard Sax and his strain of the same sex schooling movement. I thought this, in particular, was an important point:
There is pretty strong evidence that preschool-aged boys develop gross motor skills faster than girls do, while preschool-aged girls tend to have an advantage in language development. As a result, boys and girls are, on average, at different levels of language and motor development when they enter school. Sax and Gurian see this as one argument for separate sex, gender-based schooling. That might be reasonable if gender were the only source of variance in young children's learning. But it's not: Young children's development is highly variable. Some 5-year-old girls might lag many boys in language skills, and some boys' motor skills might lag those of their female peers. If one is really concerned about adjusting education to variations in children's development, increased customization and multi-age groupings in early elementary school, which allow teachers to group children who are developmentally similar, regardless of age, and children to progress at their own paces, are a far better solution than simply separating children by sex.Of course, if one is mainly concerned with returning us to a world that only ever existed in issues of Ladies' Home Journal from the 1940s, then such innovations may be beside the point.
