Music can create a mood, feelings or images. The type of music chosen will reflect a difference in these as dark and sombre sounds will create doom and gloom whereas a bright and happy piece of music can uplift you and make you smile. Dependant on the topic of teaching the choice of music can create a mood in the class to set a stage of learning.
My choice of music is classical as I find it relaxing and it evoked mind images of the beach, waves and calm. Great for teaching about the beach ecosystem.