If you are a regular reader of my blogs you'll know that I have always been interested in both ends of the second language acquisition spectrum: conscious (explicit, learning, skill-building etc) and unconscious (natural, implicit, comprehensible input, acquisition etc). The more I have looked at the theory and research over the years, the more I think this particular debate about acquisition is a little futile. Because we cannot be sure what is happening in the 'black box' of the brain, if we make sure we provide meaningful, repetitive, structured exposure to language, plus some explanation, practice and communicative interaction, learning will occur. Now, the rate at which learning will occur depends on a range of factors, including, crucially, motivation, plus lots of others such as aptitude, teacher quality, number and frequency of lessons, amount of homework, spacing of lessons and quality of input. Anything which can be done to optimise these factors will improve th...