CORVALLIS Its a Tuesday morning, and Kevin Ahern is entertaining a room full of college students in an introductory class to biochemistry and biophysics with a voice that carries and a lesson that is positively lyrical.

The class is full of young students, many of them in the second week of their first year of college. They have many reasons to be nervous; their course work is among the most difficult at the university. But Ahern, a senior instructor of biophysics and biochemistry at Oregon State University, has found a way to calm jitters.

Music.

After brief announcements and role call during which Ahern proves that he knows his class of about 50 students by name and face he projects song lyrics on an overhead screen that contain words like ribosome and DNA.

Then, without hesitation, he begins to sing the scientific lyrics to the melody of America, the Beautiful and the class follows his lead.

This is Metabolic Melodies, one of Aherns unconventional teaching methods to cut through the anxiety that new students often feel when first entering his class.

Ahern, who jokingly claims the title of frustrated musician, began writing the melodies in 1990.

I originally conceived of the melodies because biochemistry itself is a pretty scary subject for students, he said.

Metabolic Melodies have made a big enough impression on the student population that Ahern often has students enrolling in his courses because of the songs.

But while they are entertaining and make the professor less intimidating, the melodies, like his other unusual teaching methods, serve a practical purpose as well.

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Unorthodox OSU prof sings to class