The Computer Teacher is a one-time and minor character in the season 4 episode "Tween For a Day". She teaches computer programming at Tommy's school and encourages people to be close to and be like machinery. In her only appearance, she argues with Robotboy, disguised as Robert Wrillby, about "being a robot" (which, in reality, means to understand how to use computers), which offends Robotboy as he wants to convince her he's indeed a human despite everyone not knowing he's really a robot, to the point he shows off his "real" body parts and ends up mooning the whole class.
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