He feels that a course on Covenant-breaking should be included in the Summer School curriculum

"...and your Assembly cannot be too careful or vigilant in watching over the Community seeking out the sources of corruption and protecting the friends. He feels that a course on Covenant-breaking should be included in the Summer School curriculum, so that the friends may understand the nature of this evil, and how it has affected our Faith for one hundred years, and other Faiths in the past. The American Bahá'ís, aside from the older ones, do not seem to have any concept whatsoever of what a Covenant-breaker is, and the place to educate them in these matters is in the Summer Schools and on other occasions when they meet in large numbers."

(From a letter written on behalf of the Guardian to the National Spiritual Assembly of the United States, September 21, 1957)

http://bahai-library.com/hornby_lights_guidance&chapter=2#n625