Chip's Baby Sister/After School Chip Chip and Potato : Season 1 Episode 52

With Mr. Diggerty out of school due to an eye operation, Chip's class gets a substitute teacher: Mrs. Whale. She runs the class differently, like the way she calls attendance and splits up the long desk. Chip doesn't like it, but while she warms up to it, Mrs. Whale has the class draw pictures of Mr. Diggerty.