Examines the cognitive basis of one experienced English-as-a-foreign-language teacher's instructional decisions in grammar teaching. Based on extensive classroom observations and interviews, the article describes the teacher's personal stores of knowledge, beliefs, assumptions, and attitudes that affect his instructional decisions. (Author/JL)

Limitations of language acquisition research are: the restricted linguistic scope of studies; lack of data in cognitive processes and learning strategies, the role of individual variables, second language acquisition, and the role of social and environmental variables; and undeveloped methodology for data collection and data analysis. (SCC)