Interesting page! I've bookmarked it for close reading at a later time.
Robin might also be interested in some of the work done by Yasmin Kafai, Idit Harel, Mitchel Resnick, and of course Seymour Papert.
Also, there's a wiki page here: http://wik.ed.uiuc.edu/index.php/Sociocultural_theory which explores some other alternatives to the naive behaviorist S-R model of learning (it's incomplete, but what wiki page isn't?).
Teaching with Moodle
Psychology of learning
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