These flexible grouping cards are a perfect tool to group students or participants in a highly engaging way!  Originally designed for classroom use, these cards proved to be highly useful for training purposes.   Fun for kids and adults, these grouping cards allow you to form groups one way (e.g. by letter), and then assign roles another way (e.g. by color).  Other options include calling upon the highest or lowest number within each group.  There are so many ways to use these cards - you'll want to laminate them because you will reuse them again and again.