Back To School By The Numbers: Tuesday

Editor's Note: Back To School is a five-part series in which Roseville Patch will provide the latest statistics from the US Census Bureau.

Average number of children participating each month in the National School Lunch Program in 2009.

Percentage of elementary through high school students who belonged to a minority population as of October 2009.

Projected number of high school diplomas that will be awarded in the 2011-12 school year.

Average annual 2008 earnings of workers 18 and older with an advanced degree. This compares with $21,023 for those without a high school diploma. In addition, those with a bachelor's degree earned an average of $58,613 in 2008, while those with a high school diploma earned $31,283.

Average annual salary of public school teachers in California as of the 2007-2008 school year—the highest of any state. Teachers in South Dakota received the lowest pay—$36,700. The national average was $52,800. High school principals earned $99,365 annually in 2008-09.