Authorities
Steve Kaufmann
Active since the early 2000s, Kaufmann is a polyglot who credits Krashen for his success in over 20 languages.
His YouTube channel shares advice on acquiring languages naturally through reading, listening, and enjoying content.
Antimoon
Created in 2001 by two Polish learners who became fluent in English using Krashen’s ideas and extensive input.
A resource website explaining how to acquire English through input, pronunciation practice, and monolingual dictionaries.
ALG (Automatic Language Growth)
Developed in the 1980s by Dr. J. Marvin Brown at the AUA Language Center in Bangkok, based directly on Krashen’s Input Hypothesis.
A method that focuses entirely on listening and delays speaking until natural fluency emerges through understanding.
Dreaming Spanish
Founded in 2017 by Pablo Romero-Fresco to apply Krashen’s theory to Spanish learning through video.
A large video library providing structured comprehensible input through stories, culture, and natural conversations.
Indi H.
Indi H.’s YouTube channel documents her journey of learning German exclusively through immersion, without speaking in the early stages.
Over time, she shares videos in which she speaks fluent, nearly native-sounding German, offering a powerful example of the results possible through input-based learning.
Her channel serves as a compelling case study for the effectiveness of silent periods and comprehensible input in acquiring a foreign language naturally.
Matt vs Japan
Matt vs Japan is a YouTube channel by Matt, a language learner who achieved near-native fluency in Japanese through immersion-based techniques inspired by Stephen Krashen and AJATT.
The channel offers deep insights into language acquisition theory, practical tips for immersion, and critiques of traditional language learning methods.
Refold
Started in 2020 by Matt from Matt vs Japan, inspired by AJATT and grounded in Krashen-style immersion.
A detailed roadmap for acquiring languages naturally, emphasizing input, comprehension, and delaying output.
Migaku
Migaku is a comprehensive language learning platform that emphasizes input-based learning, aligning with Stephen Krashen’s Input Hypothesis. It offers tools like browser extensions and media analyzers to help learners consume and understand native content effectively.
GrapeSEED
Introduced in the early 2000s as a classroom program grounded in Krashen’s Natural Approach, especially for young learners.
A global curriculum teaching language to children through story-based, meaningful input without grammar instruction.
Language Transfer
Created in 2011 by Mihalis Eleftheriou as a nonprofit project rooted in logic and comprehension over memorization.
An audio course series that focuses on conceptual understanding, aligning with Krashen’s emphasis on meaningful input.
AJATT (All Japanese All The Time)
Started in 2006 by Khatzumoto as a personal immersion experiment built on Krashen’s theory and massive input.
A blog and method that promotes full immersion in Japanese using real media and daily exposure.
Will Hart 何威
Will Hart’s YouTube channel follows his journey as a British medical student who became fluent in Mandarin after two years of immersion.
He shares personal insights, effective learning techniques, and free resources to help others learn Mandarin in a fun and engaging way.