““Another factor in the success of French immersion, Krashen postulated, was the exclusion of native-French-speaking students. The linguistic composition of the classroom, restricted to second language learners, made teachers constantly aware of the need to shelter their French to make it understandable at or near the level of the class. This also created a relaxed learning environment, reducing students’ stress levels. They all made errors in French and, without the presence of native speakers of French, errors were less cause for embarrassment. The result was to lower what Krashen has termed the affective filter, a psychological barrier that can keep comprehensible input””
