KJ's Quartet, led by Windham High School's dean of fine arts, Karen Sayward, performed such jazz standards as "Take the 'A' Train" and "Night and Day."
Post said it was the first public event at the new school.
School Superintendent Frank Bass welcomed the businesspeople and visitors to the school.
He said students would partner with local businesses through internships, mentorships and apprenticeships to bring the real-life lessons they learned back to their classrooms.
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