"going back some two thousand years" Corrected typo: "thouand" Chapter XVI "the silent inspiration of that picture" Corrected typo: "pciture" Chapter XIX "the statement, "The best method is a variety of methods."" Closing quote missing in original Chapter XX "map out their work so carefully" Corrected typo: "map our" Chapter XXI "a. The review question;" Corrected typo: "question:" "'As long as I do all the talking, things go all right,'" Closing single quote was double quote in original "when, where, and why." Missing period in original Chapter XXII "to go to bed agreeably" Corrected typo: "agreebly" Chapter XXIII "to participate in class discussions?" Corrected typo: "discussions." In addition, in Chapter XVI a full line was missing. The original reads: "And again, I command thee that thou shalt pray vocally as well as well as in private." (Doc. & Cov., Sec. 19:28.) The corrected text is: "And again, I command thee that thou shalt pray vocally as well as in thy heart; yea, before the world as well as in secret, in public as well as in private." (Doc. & Cov., Sec. 19:28.) End of Project Gutenberg's Principles of Teaching, by Adam S. Bennion