Delivery Debbie goes undercover to stop a group of villains. Learning goal: algebraic Thinking: using complex clues, rules, and patterns to solve mathematical problems. Then, when Olympia finds out Dr. O is leaving, she struggles to throw the best goodbye party ever! Learning goal: Measurement: staying within a budget.

Originally released by PBS, 2017. Streaming video file encoded with permission for digital streaming by Infobase on March 15, 2022.