my top meditation exercises

We did a lot of great exercises in this class, I learned so much on spiritual and mental health.  One of my favorite exercises was the loving-kindness exercise.  This class has really shown me the benefits of meditation.  I never got into the visualization exercises though. The Crime of the Century exercise was also fun.  During this class I researched the many benefits of meditation and I don't understand why there isn't more emphasis on these practices?!  We should even start teaching children in schools about these exercises!!