Math Songs help struggling kids

Many kids by the time they reach 3rd or 4th grade start to struggle with math. In the United States, it is a crisis of low math test scores in math and science.
One problem is a shortage of math teachers overall, and in every group, there is always a group of bad apples. Of course the majority of math teachers are hard working and knowledgeable.
What we do know is, creativity, flexibility and patience will work.
Teachers that incorporate music, such as educational math songs, activities, group projects, games, contest and incentives, terms not usually associated with math, seem to have the most success.