Figure out who you are and how you work best (especially when in groups/teams) by taking the Tony Robbins Disc Profile test  
Click here 

I absolutely loved this test.  Of all  the personality/leadership style tests/surveys that I have taken while working on my EdS., I find this the most accurate.

I would like to have teachers in my department and on my curriculum teams take this survey as it helps one understand how they work in groups. 

Here are some of the findings based on MY answers