You claim to be an academic (university lecturer) and you seem to know bugger-all about good pedagogy or student management.
You are also low on the scale of English usage too. e.g. "I would of thought" [sic] instead of the correct "I would have thought". In several of your posts in this thread you consistently misuse the intransitive form of verbs. Either, English is not your first language or you set yourself very low standards of articulate communication.
Better that you learn to accept that your child's teacher uses songs and musical cues to establish class routines and to focus the children at particular times of the school day.
If you feel that you must intervene, do approach the teacher and ask your questions from an "I need information" POV.
Ask the teacher, "I am a little surprised at some of your classroom methods that I hear about from my child. Is your singing and use of music in line with the needs of some of the student cohort?"
Maybe, also, try, "I have found (at home) that my child is more of a visual/aural/kinaesthetic learner. My spouse and I find direct requests work well with her/him nearly all the time."
And, perhaps, "Do you have any specific advice that we need to know to assist our child glean the most from the curriculum this year. We'd be more than happy to reinforce your guidance."