Paul Black describes peer and self assessment
http://www.youtube.com/watch?v=NnqHERCFsWM

Paul Black discuss the role of grades versus comments in student learning
http://www.youtube.com/watch?v=vOhE2KldmT0&feature=relmfu

Paul Black's Master class in assessment
http://vimeo.com/42337683

Primary assessment Formative assessment 2
http://www.creativeeducation.co.uk/videos/watch-video.aspx?id=242
Teaser from Teachers tv Primary assessment with Paul Black
http://vimeo.com/5184675