This publication contains 12 (A3 open-out) poster-style reports of teacher experimental research. The style of presentation parallels the type of preliminary reporting common at academic conferences and postgraduate events. At the same time, it aims to act as a form of short primer to introduce teachers to the basic options that there are when conducting this type of research. This said, the determined teacher-researcher would be advised to extend their reading further to full-scale textbooks such as Richard Churches and Eleanor Dommett's Teacher-led research: how to design and implement randomised controlled trials and other forms of experimental research which clearly explains how to choose and conduct the right statistical tests. CfBT Education Trust also offers an in-depth training programme over two days with access to statistical software and support for teachers when conducting and writing up their research. Most of the teachers in this report followed this programme in Wales, or in one case Dubai. Others, associated with Kyra Teaching School Alliance (led by Mount Street Academy, part of the CfBT Schools Trust), attended the Department for Education/National College for Teaching and Leadership training that Richard Churches delivered as part of the Closing the Gap: Test and Learn programme in England. [The teacher-researchers contributing to this document are as follows: Kate Andrews, Simon Andrews, David Ashton, Timm Barnard-Dadds, Sarah Baugh-Williams, Bridie Bear, Ceri Bibby, Wendy Blyth, Allison Davies, Rachel Elphick, Dean Flood, Emmet Glackin, Gavin Jones, Graeme Jones, Daniel Lear, Matthew Maughan, Jess Moore, Charlotte Morris, Theresa Peacock, James Siddle, Alison Turner, and Rob Wilson.]