I will be doing an assessment center taking 2 days with middle management of a company. I am in charge of preparing observation check lists for trainers to evaluate team work and competencies on leadership and group dynamics.
Recently I came across a really nice book "Group Dynamics and Team Interventions" by Timothy Franz. The book is structured along the IPO-model and for each model part a number of important topics are discussed in chapters. Moreover, the author provides questionnaires to assess the team (e.g., team communication assessment) and proposes potential interventions. So maybe you can find some useful hints in there.
Here is the reference: Franz, T. M. (2012). Group Dynamics and Team Interventions: Understanding and Improving Team Performance (1st edition). Wiley-Blackwell.
Do you have by any chance a good reference/model/framework dealing with team interventions and facilitation?
At our firm, where I currently work we often use SWOT analysis to implement changes.
But when facilitating you can always use the FFF model.
Feelings (what was going on, what has happended with the participants, what did they feel, what was the behaviour that trigger it...),
Funciton (what was the outcome of an excercise, what was the goal, was it achieved, what was the function of the specific behaviour for the actor of the behaviour, what was the goal...),
Future (what can we change, what kind of action will we tak in the future when something like this accures, what have we learn and what do we want to use from the excercise...).
You can always check different trainer sites for tools, such as:
http://www.businessballs.com/
http://www.mindtools.com/index.html
http://www.nwlink.com/~donclark/index.html
You will find a lot of material on those sites and you can use them. Maybe you can also check for NEULAND videos on youtube, they could be helpful when trying to come up with a new team excercise.