Citing President Obama's intent to strengthen community colleges, "second lady" Jill Biden told the 2009 graduates of Kingsborough Community College the two-year schools are "one of America's best-kept secrets," and "the education gained on campuses like this one will provide the knowledge that will power the 21st century." Dr. Biden, an adjunct professor at Northern Virginia Community College who taught English full-time at a Delaware community college for 16 years, referred to Obama's higher education proposal, which includes a community college initiative to better prepare students for the job market and encourages their transfer to four-year schools. "The president wants the U.S. to have the highest proportion of college graduates (in the world) by the year 2020...and he knows community colleges will play a major part in achieving this goal."