In general terms SLA makes a distinction between acquisition process (similar to the way we learn L1, a subconscious acquisition) and learning process (conscious process). Both processes interact together in a meaningful context, which means in a natural communication.
Why don’t we reach the same level as a native speaker? Affective filters are “negative feelings towards the target language or learning situation (…) then the input which should feed the acquisition process is blocked.”(pg. 240)
There are two models based on SLA
1. The Natural Approach: explains that the most relevant elements in language acquisition are to provide comprehensible input. The activities are focused on affective-humanistic factors to decrease the affective filter. The main idea is to centre the activities on meaning rather than form.
2. The Total Physical Response: this method is underlined by two characteristics. The first one is related to the importance of getting big amount of input before starting to speak. Secondly, when kids receive input (imperative sentences, orders) they do physical manipulation and respond to the requirement. Therefore teachers have to emphasize in comprehension rather than production.