References
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- National Board for Professional Teaching Standards . 2007 . Profile of professional growth , Arlington, VA : NBPTS . Available at: www.nbpts.org/userfiles/File/PPG_pod.pdf
- National Board for Professional Teaching Standards . 2009 . Renewal at a glance , Arlington, VA : NBPTS . Available at: www.nbpts.org/for_nbcts/certification_renewal
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