PM is a firm favourite amongst Primary Schools due to its reputation for reading success. Offering over 800 carefully levelled fiction and non-fiction books, PM builds confidence through gradual progression and step-by-step support. Both earthquakes and tsunamis occur where enormous stresses build up along fault lines on the Earth's outer crust. However, there are ways to help keep people safe. Other text forms include diagrams, map reading, explanations and a newspaper report.