Jazz musician Jack Sheldon, who worked with some of music’s greatest names and who also gained fame as a singer on a number of Schoolhouse Rock! songs, has died at the age of 88. Doug McIntyre, who is Sheldon’s biographer, reported the death in a Facebook post. The cause of death was not announced. Sheldon was a bandleader for … Continue reading ‘Schoolhouse Rock!’ Singer and Jazz Musician Jack Sheldon Dies at 88