Action research is not a research paper like we did in high school where you read lots of articles and then summarize what you read. It is much deeper and systematic. It is not about why we do things but how we can make things better.
An action research inquiry can be done by one person or preferably a group of people that want to improve the school.
I came across this graphic on the internet on http://www.web.net/robrien/papers/arfinal.html#_Toc26184651
and I really liked how they made the model of the cyclical nature of action research:
Dan MacIsaac, "An Introduction to Action Research," 1995, http://www.phy.nau.edu/~danmac/actionrsch.html (22/03/1998).