?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Blatchford%2C+Peter&rft.aufirst=Peter&rft.aulast=Blatchford&rft.issue=1&rft.issn=1469-3518&rft.date=2007&rft.pages=5-26&rft.title=British+Educational+Research+Journal&rft.volume=33&rft.atitle=The+role+and+effects+of+teaching+assistants+in+English+primary+schools+(Years+4+to+6)+2000-2003.+Results+from+the+Class+Size+and+Pupil-Adult+Ratios+(CSPAR)+KS2+Project&rft.genre=article