Sadly, Music education is one of the first things to be cut, right behind physical education and art.
I am speaking from experience. Five years ago my district cut a Music Teacher position, which meant that my student load went from 750 to 1500 (you read that number correctly)! It has been truly awful, the kids hate it, and I thought I was going to lose my mind.
The only thing that changed my schedule was our new evaluation system. They had to include the other teacher to help take over some of my load so that when we measure the growth of our Standard Learning Objective, we would show the same amount of growth. What they have conveniently forgotten is that my students have missed out on about two and a half years of music instruction. Somehow I'm supposed to make up for that and show the same growth that the other teacher will. Yes, my union rep. is on speed dial right now 
There is a district around here that offered DAILY music instruction to their students (as opposed to weekly, which is normal - or every other week like me, which is not normal). I spoke with one of their teachers. He said that by the time they would get to him (8th Grade), every single student could sight read music, improvise and compose. Their test score are the highest in the state. And sadly again, that district cut some of their positions recently and no longer give daily music instruction. I wonder how long before their test scores slip.
Learning to read music means that you have to read two different languages at once - melody and rhythm. Melody focuses on the direction of pitches, rhythm focuses on the duration sound. Learning to put the two together is what really begins the expansion of learning in the brain.
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