Two news stories shine a bright line on the allure and failed promise of AP courses.

Liz Bowie of the Baltimore Sun has an outstanding article about AP courses in Maryland, which has invested heavily on this strategy to lift achievement.

She writes that the expansion of AP courses has not lived up to its claims. “It has not delivered vast numbers of students from low-performing high schools to selective colleges with credits in their pockets, helping to bridge the academic gulf between the nation’s rich and poor. Too often, students who haven’t been prepared in earlier grades flounder in AP classes, or are awarded A’s and B’s in the courses and then fail the AP exams.

“The high grades for course work can lull students into a false sense of security, said Steve Syverson, a board member of the National Association of College Admission Counseling and a former dean of admissions at Lawrence University in Wisconsin. Many students arrive at college with AP courses on their transcripts, but with skills so low they must take remedial classes.

“The kids are … doing what society is telling them to do,” he said. “We just set those kids up for complete failure because they just get hammered when they get to college.”

“A Baltimore Sun analysis of test scores showed a troubling discrepancy between grades for AP course work and scores on the exams. In at least 19 high schools throughout the Baltimore region, more than half of the students who earned an A or B in an AP class failed the exam.

“Failure rates of 75 percent on the exam were common at Woodlawn and other Maryland schools with large numbers of minority and low-income students. For the 2011-2012 school year, the most recent available data, about 40 percent of students who took an AP test in the nation failed. But nearly 75 percent of African-American students nationwide failed, and the pass rates for Latinos and low-income students are far below those for whites and Asians.”

In a related story, Stephanie Simon at politico.com reports that the national picture is troubling:

“Taxpayers have spent hundreds of millions of dollars in recent years to nudge more students into Advanced Placement classes — but a close look at test scores suggests much of the investment has been wasted.

“Expanding participation in AP classes has been a bipartisan goal, promoted by U.S. Education Secretary Arne Duncan and by Republican governors including Bobby Jindal of Louisiana and John Kasich of Ohio. In the last five years, the federal government has spent $275 million to promote the classes and subsidize exam fees for low-income students; states have spent many millions more.

“Enrollment in AP classes has soared. But data analyzed by POLITICO shows that the number of kids who bomb the AP exams is growing even more rapidly. The class of 2012, for instance, failed nearly 1.3 million AP exams during their high school careers. That’s a lot of time and money down the drain; research shows that students don’t reap any measurable benefit from AP classes unless they do well enough to pass the $89 end-of-course exam.

“In its annual reports, the nonprofit College Board, which runs the Advanced Placement program, emphasizes the positive: The percentage of students who pass at least one AP exam during high school has been rising steadily. Because so many students now take more than one AP class, however, the overall pass rate dropped from 61 percent for the class of 2002 to 57 percent for the class of 2012.”

No matter what happens to the kids, the nonprofit College Board does well indeed.