This article reports on two anglophone teenagers learning French – one exposed to a six-month stay in France, and the other exposed to an instructional environment. The corpus collected from six tape-recorded interviews shows an increase in the number of tokens and lexically distinct verbs produced, and in the percentage of correctly inflected verbs. The subjects' use of correct and incorrect forms supports a rote and rule model of morphology. L2 learners seem to make use of a coalition of resources – primary linguistic data as well as cognitive strategies for grammatical rule formation – to create their interlanguage grammar.