The creator of “Schoolhouse Rock” from the heyday of Saturday morning cartoons is celebrating 40 years of the popular educational songs at the Kennedy Center on Sunday.

Bob Dorough, who wrote and voiced many of the tunes, will lead a free sing-along concert at 6 p.m. of the short, rhyming songs used to teach children math, grammar and science.

His “Schoolhouse Rock” jams first appeared on television 40 years ago next week.

The first three-minute animated video was “My Hero, Zero.” It appeared on Jan. 13, 1973.

Dorough, now 89, was a jazz composer in the early 1970s when he was tapped to write catchy and educational songs.

Among the most popular video jingles: “Conjunction Junction.”

“Schoolhouse Rock” ran until 1985 then remerged for several years in the 1990s.

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