This is a semi-review and wake-up exercise when covering material that requires heavy concentration.
Have everyone stand up and form a resemblance of a circle. It does not have to be perfect, but they should
all be facing in, looking at each other. Toss a nerf ball or bean bag to a person and have tell what they
thought was the most important learning concept was. They then toss the ball to someone and that person
explains what they though was the most important concept. Continue the exercise until everyone has
caught the ball at least once and explained an important concept of the material just covered.