In previous reviews of studies comparing explicit and implicit instruction (Krashen, 1981, 1982, 1999, 2003), the author argued that explicit instruction will show a positive effect only when the following conditions for the use of the conscious Monitor are met: (1) the acquirer consciously knows the rule or the meaning of the item--that is, has…

This article notes seven key problems in language learning strategy concepts and classification systems as they relate to empirical research in the area of second- and foreign language development and suggests ways to resolve these problems and thereby increase unity, coherence, and meaningfulness of language learning strategy research. (99…