Curriculum and Standards
Your district may provide a music curriculum for you to use. State and National Standards in music and the arts also provide important goals for your curriculum development and lesson planning.
Arizona Arts Standards, from the Arizona Department of Education: http://www.ade.state.az.us/standards/arts/.
National Music Standards, from MENC: http://www.menc.org/publication/books/standards.htm.
Articles and sample curricula of interest to music educators abound on the web. For example: http://www.sasked.gov.sk.ca/docs/artsed/. See also, ArtsEdge, sponsored by the Kennedy Center in Washington, D.C.: http://artsedge.kennedy-center.org/artsedge.html.