Other functions include planning, curriculum development, and research in second-language acquisition.

Inside China, second-language acquisition is generally achieved through immersion in the local language.

Additionally, these studies proposed that first language and second-language acquisition may be represented differently in the cortex.

Efforts have been made to systematically measure or evaluate the effectiveness of language teaching practices in promoting second-language acquisition.

Due to the interdisciplinary nature of the field of second-language acquisition, this is not expected to happen in the foreseeable future.

Much modern research in second-language acquisition has taken a cognitive approach.

As such, cognitive theories view second-language acquisition as a special case of more general learning mechanisms in the brain.

The learner's attitude to the learning process has also been identified as being critically important to second-language acquisition.

Second, it was also compatible with the knowledge about second-language acquisition at the time.

For this reason, individual variation in second-language acquisition is not generally considered a single area of research.