Hi  everyone.I would say few words for ABCD  model.This model is  supported by Bloom's taxonomy.To be a successful teacher,you should write clearly at least three objectives.These objectives are what teachers intend to do and simultaneously measure  the progress of students.Written these objectives,the teacher should based on four criteria such as a-audience,b-behavior,c-condition ,d-degree.Whether the teachers apply  these rules in writing objectives and apply these objectives effectively during the lesson,the hour will  be successful.