Scholarly databases - all-around useful articles spanning many subject areas:
Academic Search Complete - database with articles about many disciplines, including art, business, education, policy, and more. Good resource for interdisciplinary topics including Dance. Note: choose "Academic Search Complete" from alphabetic list of databases.
JSTOR - Online archive of full-text scholarly journal articles. Journals go all the way back to the first issue of publication, even centuries ago in some cases (great for historical context). Full-text articles stop at a rolling cutoff of six years ago. Current articles are available in the library's other databases.
Scholarly Reference databases with useful information:
Biography in Context - excellent resource for biographies of dancers, choreographers, and other important figures of the dance world.
Credo Reference - database with scholarly encyclopedias and references resources.