sentences:  In the episode "The Boy Who Knew Too Much", the regular school bus breaks down and a Springfield State Prison bus is used instead.The bus is sometimes shown to be in extremely poor condition, another indicator of the school's low funding.In "Lisa the Vegetarian", it is shown that both Ms. Hoover and Lunchlady Doris have access to "Independent Thought Alarms" which are sent to Principal Skinner's office and are both triggered by Lisa.