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What is pedagogical content knowledge and do you have it? Do you need it? Happy reading Nicola =========================================================== Dr Nicola Ward Petty Aka Dr Nic Statistics Learning Centre http://statslc.com/ Resources, videos, blog, help - you can find it all at Statistics Learning Centre. You may leave the list at any time by sending the command SIGNOFF allstat to [log in to unmask], leaving the subject line blank.