Contrastive analysis a priori predicts facts of possible errors in learning a second language that contrastive analysis a posteriori cannot explain. In a study of relative clause formation, the latter approach shows that students have no trouble, whereas the former approach shows the task to be so difficult that they avoid it. (AG)

Compares the theories of Chomsky and Fillmore. By representing "case" as a feature of lexical items, the deep/surface distinction can be eliminated, and the resulting "lexicase" framework looks promising as a basis for the design of language teaching materials. (Author/RM)

Revised version of a paper presented at the TESOL Convention, March 1971, New Orleans, La. (VM)

The discoveries of theoretical linguistics could aid teachers in explaining such usages as "well,""sort of," sex link uses, and forms marking levels of politeness. Conversely, there is much about second language learning that theoretical linguistics could learn from applied linguistics. (Author/KM)

In this longitudinal study in which a second language was used as the sole or major medium of instruction, the experimental group performed as well as or better than the control groups with respect to language skills, academic skills and cognitive development. Pupils could also communicate effectively in their second language. (AG)