MARBLEHEAD-Marblehead High?s choral music director Amanda Roeder is a cover girl – well, being a teacher, she?s actually a cover person.Roeder is on the cover of the September issue of Choral Director, published by Symphony Publishing Group in Needham, and she is the subject of a lengthy article entitled “The Unrelenting Ambition of Amanda Roeder.”?She is so very, very cool, as our students call her,” Superintendent of Schools Paul Dulac said when he announced the news Thursday.The article uses a question-and-answer format to determine how in eight years she has doubled the number of students in the school music program and become a music producer for school a capella group CDs.Roeder told the interviewer she was a drum major and a “band kid” in high school, decided to become a music teacher when she was 15 and didn?t get really serious about singing until she sang with the University of Massachusetts Chamber Choir and Madrigal Singers.The moment she arrived in Marblehead she saw a “quaint little seaside town” with its art galleries and a “gorgeous high school theater” and knew she wanted to work there n and in her second year a former high school principal gave her the chance to create a high school music program.Her first addition was a co-ed Chamber Choir in 2003 – and when they showed a strong interest in a capella singing they became the Jewel Tones. In 2005 she added a girls? a capella group who called themselves Luminescence and in 2008 she added two more groups, one for boys and one for teachers. In their second year the boys? group is becoming student-directed.Editing the CDs that the Jewel Tones and Luminescence recorded at Notable Productions in Watertown taught Roeder humility and the patience to find the best possible phrases among the mistakes, produce a finished recording and help her students to avoid making the same mistakes again n and the effort was recognized with award nominations and awards. Tracks from the Jewel Tones album Tied Together and the Luminescence album nonpareil were included on the 2008 and 2009 annual Varsity Vocals compilation CD, Best of High School A Cappella.In 2008, Jewel Tone soprano Chelsey Reardon received the Jonathan A. Minkoff A Cappella Award (JAMAA) for her senior project, an album of collegiate and professional a cappella whose proceeds went to the Pure Water for the World Foundation.Roeder admits that finding balance in life can be a challenge for her and her students.?Many high school students today – and not just those in my community – are workaholics in the making,” she told the reporter. “I want my students to have joyful, fulfilling lives. I try to find the balance, allowing time to just be me, not Ms. Roeder, but just me. It’s not easy.”In spite of the challenges, she said, “I think my favorite moment of every day is when the bell rings and my students walk through the door for rehearsal.”