evidencebased.education supports the AllTrials campaign. We do this not only to raise awareness of publication bias and to encourage all involved in publishing – from authors, to editors, reviewers to publishers – to make public every piece of clinical trial research available, but also to encourage the education research community to do the same. RCTs in education are increasing in number, and the attention of teachers, school leaders and policy-makers is turning to robust research evidence for guidance; we want to make sure that the literature available to education stakeholders is complete, and the researchers’ file drawer is empty.