Things aren’t looking good for Class 4X. With another teacher running away screaming (literally), Arlo wonders how long the new supply teacher will survive. Maybe it’s her animal skin dress or bone earrings, but Mrs Ogg doesn’t quite seem to be the teacher anyone’s expected. When a trip to the zoo is organised, Arlo realised this might be the chance to prove 4X can behave. Only Mrs Ogg fails to mention that this is no ordinary zoo…