Geoff Petty has a lovely accent and offers a wealth of information and resources on his website www.geoffpetty.com and through the website called Teachers Toolbox: http://www.teacherstoolbox.co.uk (Cambridge Regional College, UK). While most of the research he refers to and teaches about is focused upon young persons, most is also appropriate for adult-learning. I especially enjoyed the videos and connected materials on constructivism, teaching without talking and best of all his "spin" on feedback (formative assessment). Dr. Petty has leveraged the work of Black and William's research. A brief introduction to this research can be found in this video and you will find many additional materials as well. Enjoy!!