"... Novice Nook readers knows that I believe that two of the most important features of chess instruction for players rated under 1600 are 'thought process' and 'time management' (the other three are tactics, piece activity, and general principles – the Big Five). So therefore any long-term instructor that does not spend at least some time listening to his student think out loud is likely not addressing an important aspect of that student’s needs. ..." - NM Dan Heisman (2002)
web.archive.org/web/20140627082829/http://www.chesscafe.com/text/heisman21.pdf
web.archive.org/web/20140627082829/http://www.chesscafe.com/text/heisman21.pdf