First, this title contains a flawed question, because the arts ARE core curriculum as of ESEA. Music, art, dance and drama are ways of knowing, and are essential for our students to grow as whole human beings. For some of them, the arts will be a career. For many more, the arts will enrich their living, working, and participation in their community and society.
For those of us still working in a traditional school paradigm (most public schools and many charter, magnet and private schools), the answer is “both!” Most smart educators know that the arts are important to enrich the curriculum, and each of the arts provides a different delivery modality for content and skills. However, children can’t learn THROUGH a modality until they have skills IN that modality.
So start by teaching students the arts skills, then use them as a delivery system for other curricular content. The benefits are measured in happier students, deeper learning retained longer, and an engaging and motivating learning environment. Where do you start? Total Learning lessons and studios!