1. http://thinkeracademy.com/critical-thinking-skills
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2. www.teachervision.com/problem-solving/problem-solving
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3. www.lifecoachhub.com/coaching-articles/7-strategies-for-effective-team-building
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4. http://hrweb.mit.edu/system/files/all/other/pd_goal_templates.pdf
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5. http://web.mnstate.edu/gracyk/courses/phil%20115/Four_Basic_principles.htm
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