The Audio-Lingual method, which was proposed by American linguists in 1950s, was developed from the principle that a language is first of all a system of sounds for social communication

Listening as a way to learning
Clearly listening is used to learn, but not all language learners employ it consciously. Listening to understand is one level of listening but focused listening is not something that most learners employ as a strategy. Focused listening is a strategy in listening that helps students listen attentively with no distractions. Focused listening is very important when learning a foreign language as the slightest accent on a word can change the meaning completely.
Reading as a way to learn
Many people read to understand but the strategy of reading text to learn grammar and discourse styles can also be employed. Parallel texts may be used to improve comprehension.
Speaking as a way to learn
Alongside listening and reading exercises, practicing conversation skills is an important aspect of language acquisition. Language learners can gain experience in speaking foreign languages through in-person language classes, language meet-ups, university language exchange programs, joining online language learning communities, and traveling to a country where the language is spoken.¹³
Learning vocabulary
Translation and rote memorization have been the two strategies that have been employed traditionally. There are other strategies that also can be used such as guessing, based on looking for contextual clues, spaced repetition with a use of various apps, games and tools . Knowledge about how the brain works can be utilized in creating strategies for how to remember words.Learning Esperanto as a propaedeutic strategy for learning other languages.Esperanto, the most widely used international auxiliary language. Learning Skills Advisors teach students how to learn, rather than teaching them specific curriculum content or specific skills. Based on referral information from the Accessibility Advisor, the Learning Skills Advisor plans a sequence of sessions designed specifically to help the student develop and/or refine the individual learning strategies he/she needs. The Learning Skills Advisor then meets with students on a regular basis throughout the semester. Learning Skills Advisors can help students develop strategies for:

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  reading and comprehending text
  
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  studying and remembering information
  
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  writing and taking notes
  
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  improving assignment and test performance
  
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  effectively interacting with others
  
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  motivation
  
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  problem-solving
  
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  time management and organization