 Season five was numbered 1A–130A (1975–1976), while season six was numbered 1B–130B (1976–1977).The last two seasons were designated as such because they were designed as year-long curricula for schools.Starting with season three, a show's number would be presented in the sketch-of-the-day teaser segment, a parody of soap-opera teasers, which would highlight a particular sketch that would be shown during that episode.