I am very much encouraged to hear from you that you are teaching KC in the schools. This is our best field for making demons into devotees, so if you give intelligent presentation of our Krishna philosophy in all the schools and colleges, there will be no end of devotees to push this movement on all over the world. Simply demonstrate chanting and dancing, and induce them to participate, then give them nice philosophy talk, with questions and answers, distribute prasadam profusely, ask them to buy our books and magazines and study them closely—that's all. Try for this program, and that will help me very much. Thank you, for helping me in this way.
(From Srila Prabhupada's letter to Madhucara — Bombay 4 February, 1972)