The need for a developmental approach for PDS research -- The Holmes Group : a vision for PDS research -- The NCATE PDS standards : inquiry as part of the interwoven fabric -- Analyses of PDS research : trends and implications -- A framework using AERA research methods and NCATE PDS standards -- PDS research at the beginning stage -- PDS research at the developing stage -- PDS research at the at standard stage -- PDS research at the leading stage -- Summary