The Simpsons” paid tribute to Marcia Wallace, who died at age 70 last month, during the opening credits of Sunday’s episode.

During the show’s famous opening credit sequence, Bart’s rotating chalkboard message read, “We’ll really miss you Mrs. K.” The show also closed with a photo of her character, Mrs. Krabappel, with the caption, “In loving memory of Marcia Wallace.”

Wallace voiced Bart’s teacher from 1990 until her death, and won an Emmy Award for voice-over performance in 1992. Fox aired Wallace’s winning episode, “Bart the Lover,” before last night’s new episode.

In addition to her role on “The Simpsons,” Wallace was best known for playing receptionist Carol Kester on “The Bob Newhart Show.”