THE BENEFITS OF MUSIC. Sentences/Gaps. would you like to correct this for me, please?

So it is CONCERNING that teaches around the world find they have to battle to incorparte music into the classroom.
Learning to play an instrument has a demonstrable EFFECT on intellegence, and when children play music together, it teaches them about co-operation.
Music helps concetration , aids relaxation and can influence MOODS AND EMOTIONS.
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listening to music is rewarding for children.
Music serve AS a source of support for troubled teenagers. Singing in groups enhances the immune SYSTEM, AND there are lower mortality rates in people who ATTEND OR ASISIT.