Songs also help to establish the prosody of the language and to enable repetition of phrases in the classroom singing mode to further practice vocabulary. Students enjoyed the singing, and they were quite likely to rehearse it residually, adding to the language acquisition phenomenon, the involuntary rehearsal in a learner's mind of previously heard foreign language talk. The repeating of a song in one's head, usually occurring when audition is followed by relative quiet, enables involuntary inner vocalization of linguistic content, which then has the effect of deepening the memory traces of this content in the mind. Songs aid in all four major language-learning areas – in listening, speaking, reading, and writing. Presenting a new song to my class, a teacher should first play the song as students listen silently look at the words, then have students repeat the words without singing them. More advanced learners may listen without looking at words to later discuss what they have heard and understood. The teacher should then point out new vocabulary, idioms, grammar items, and give, if needed, pronunciation cues. Then play the song again, letting the students join in when they feel confident about singing along. The following step is to take students into a question-answer session with the teacher or other students, encouraging imitation, improving memory, and negotiating meaning. The advanced level requires students to write out a text with a musical representation of its rhythm, and perform it.