Article: Lessons learned from fifty years of theory and practice in government language teaching
This article dates to 1999, but I thought with all the recent meta discussion about how to learn a language, these reflections on FSI lessons learned could be of interest:
https://csclub.uwaterloo.ca/~rfburger/fsi-gurt-1999-07.pdf
I think it is all worth a read, but for anyone just wanting the overall takeaways, they are:
Lesson 1. Mature adults can learn a foreign language well enough through intensive language study to do things in the language (almost) as well as native speakers.
Lesson 2. “Language-learning aptitude” varies among individuals and affects their classroom learning success (but at least some aspects of aptitude can be learned).
Lesson 3. There is no “one right way” to teach (or learn) languages, nor is there a single “right” syllabus.
Lesson 4. Time on task and the intensity of the learning experience appear crucial.
Lesson 5. Learners’ existing knowledge about language affects their learning.
Lesson 6. A learner’s prior experience with learning (languages or other skills) also affects classroom learning.
Lesson 7. The importance of “automaticity” in building learner skill and confidence in speaking and reading a language is more important than has been recognized by the SLA field over the last two decades.
Lesson 8. Learners may not learn a linguistic form until they are “ready,” but FSI’s experience indicates that teachers and a well designed course can help learners become ready earlier.
Lesson 9. A supportive, collaborative, responsive learning environment, with a rich variety of authentic and teacher-made resources, is very important in fostering effective learning.
Lesson 10. Conversation, which on the surface appears to be one of the most basic forms of communication, is actually one of the hardest to master.
Many interesting threads to pull on that are applicable to people here. Including an observation that immersions are more helpful at a higher level, etc...