Help students achieve success in editing for the O level exam paper, with detailed explanations to strengthen their understanding of grammar and the types of error that may be found in texts. – Teach students to identify and correct errors in a wide range of passages of varying degrees of difficulty. – Deepen understanding of the most common errors and how to edit them with various types of errors listed and tips for tackling a passage, including a worked example in Part 1. – Ensure students master the skills to be able to identify and correct grammatical errors in a range of texts with progressive practice provided in 10 basic, intermediate and advanced passages.