The National Gallery of Art provides educators, parents, and students the opportunity to create their own works of art. This is an example of of one such activity that allows the educator to not only reinforce the lessons taught in art but to make the learning process real.
Source: http://www.nga.gov/kids/kids.htm
Music was a means for many of our ancestors to examine the meanings of their daily lives. The roots of this great country have been documented in the lyrics and songs of the past. Through exploration of the cultural documentation in songs, educators can assist students in gaining an understanding of the complex issues that faced their ancestors as they strove to conquer the land and the inhabitants of America.
Like Smithsonian Jazz, Smithsonian Folkways has some nice, thorough teaching materials.The link is http://www.folkways.si.edu/tools_for_teaching/introduction.aspx