Truth and Consequences - S3-E7
Stupidity: This episode shows the school's faculty time-clock to be in a common area of the school. Placing a time-clock in such an area would be extremely foolish, as any disgruntled or prankster student could easily mess with a faculty member's timecard. Not to mention the episode shows Janitor Bud bribing a student to clock him out long after he has left for the day.
Answer: Topanga's middle name is never specified. Considering her sister's name is Nebula Stop-the-war Lawrence, Topanga's is probably something equally unusual.