Automatic Language Growth, or ALG, is a comprehensible input-based approach to language teaching, meaning it’s based on the idea that we learn languages by being exposed to them in ways that we can understand what is being communicated.
This puts ALG in the same category as better-known CI-based approaches such as TPR (Total Physical Response), TPRS (Teaching Proficiency through Reading and Storytelling), and Story Listening.
What sets ALG apart is that it is a developing theory and method of language acquisition that was conceived with the goal of bringing adults from zero knowledge to native-like fluency in second languages.
The ALG approach can in fact subsume these other CI-based approaches where they are consistent with its approach to language learning.
Many language learning methods, programs, and products are touted as new, different, or even revolutionary, yet a cursory examination reveals they’re at most a rehashing of what’s been done already in many other times and places.