As school-based action research has taken a higher profile in UK schools, the place of ethics warrants particular attention. This paper draws on evidence from a taught online Master of Education course collated via chat room discussion where 53 researching teachers were asked to explore policy within their own institution regarding school-based action research ethics. None of these teachers identified the existence of any such policies but described instead current practices. We analysed their reported school-based action research practices and discovered three major categories of response: the unexamined use of gatekeepers; the unsupported use of existing ethics guidelines (such as those of the British Educational Research Association); and the conflation of legal and ethical demands by schools. We raise questions relating to the relationship between ethics and education and call for all those involved in school-based action research to take part in developing action research ethical policy in school.