Gov. Martin O’Malley wants to spend $3 million to cover Advanced Placement test fees for Maryland students — and nearly $1 million would go to Montgomery County.

Under O’Malley’s plan, Marylanders would pay for students’ $86 per subject fee in school year 2011-2012 for AP exams in biology, calculus, chemistry, computer science, environmental science and physics. The state also would cover PSAT testing for all high school students.

The following year, the state would cover fees for all AP test subjects.

More than one-quarter of the state’s students taking AP exams live in Montgomery County, according to the 2010 AP Report to the Nation.

And Montgomery’s pool of AP students are 25 percent more likely to take more than one exam than AP students from elsewhere in Maryland, the report said.

Voter-rich Montgomery has been a focus of O’Malley’s campaign for re-election, as well as for his Republican opponent, former Gov. Bob Ehrlich.

O’Malley’s plan to cover AP exam fees is contingent on his re-election in November.