Using the call-and-response method he helped popularize, Seeger had audiences singing in Spanish, Hebrew, and English -- - in rounds with four-part harmony. His "Boyce's Alleluya" became an explanation of musical notation -- and a bizarre but pretty overlap of baroque choir music and clawhammer-style bluegrass banjo picking. Seeger skipped "If I Had a Hammer," "Where Have All the Flowers Gone?" and "Turn Turn Turn" (they were part of a performance video shown as part of Rock Hall education director Bob Santelli's preshow interview). But as he warbled through "Skip to My Lou," "Guantanamera," "Midnight Special," and "Goodnight Irene," his grandson's strong, clear tenor leading the way, Seeger once again demonstrated the brilliance of a simple adage his father told him -- "The important question is not "Is it good music?' but "What is the music good for?'" If teaching the world to sing in harmony is the answer, it's still a pretty darned noble goal. -- Lynne Margolis