I was disturbed by the article on Montgomery County students’ chronic failures on final math exams [“Montgomery math grades, test scores aren’t adding up,” front page, May 20]. But the most troubling part of the story is the county’s own “math” that provides for the final exam to be “worth 25 percent of a course grade,” thereby allowing students to fail the final but still pass the course. This is absurd, given that the final is the only exam that covers the entire course material, and it is no way to prepare students for college or beyond.

Bob Benna, Potomac