The current knowledge of language development includes a large amount of theory, research, and debate from a variety of fields. These include linguistics, psychology, philosophy, sociology, medicine, computers, biology, neurology, speech and language pathology, and education. What is known about language has come far in recent decades due to a recent flurry of activity in these disciplines, and as a result of the interdisciplinary sharing of information between the groups. Still, there are many questions. The nature-nurture debate rages, as do arguments regarding the pros and cons of specific theories of language acquisition. The search for autism’s elusive cure has gained unprecedented heights of popularity. And, how has language evolved? Or has it? To what extent, if any, does language precede thought? These and similar quests have sparked considerable debate but little consensus. And one large question still looms: Is it possible to devise a systematic way to teach language?