The document discusses common mistakes in creating English lesson plans according to the Indonesian national education regulations. It outlines the 11 required components of a lesson plan and two frequent errors: 1) Not following the standardized format which can result in missing components, and 2) Inaccurate or incomplete content within the components, such as abbreviated standard competencies instead of the full original text. Overall, the document provides guidance to teachers on properly structuring lesson plans according to the national guidelines.