Another internal reason is that the lesson plan enables the teacher to learn the subject matter that he is to cover during a lesson better. As indicated by previous researches the teachers who prepare the lesson plans always go to class with a better understanding of what they are going to teach compared to those who do not. It also indicates that the teachers who use lesson plan are able to obtain a wide range of knowledge about the subject matter in which to teach about before undertaking the lesson. This enables this kind of teachers to be able to run the teaching process effectively and thus enhancing the learning process among their students.The lesson plan also enables the lesson to run smoothly. Since in a lesson plan each activity is allocated its time a teacher can easily be able to ensure that the lesson is ran smoothly without major interruptions. Moreover, since the activities in a lesson plan are sequentially arranged a lesson plan can help a teacher to avoid running his lesson in a confused manner thus increasing the effectiveness of his teaching process. When the teaching process is run in an orderly and smooth manner, the learning process among the students is enhanced and thus resulting to a greater understanding among the students about the subject matter being taught. Another internal reason why a lesson plan is important is that it can enable a teacher to anticipate problems before they happen. If a lesson plan is well prepared, it is believed that it can enable the teacher to reflect.