Observation of a KS3 English class; monitoring the success level lesson planning and timing

Both planning and timing go hand in hand as the inclusion of good time management is a consequence of a lesson plan that is well prepared and successful. So, instead of considering each factor separately, I will acknowledge both these elements together, as a well planned lesson results in good time management and a steady flow to the lesson.
My observation was a successful venture as it demonstrated how a well planned lesson consequently has a positive effect upon the class and the timing of the lesson. All elements of the lesson linked together and sustained a steady pace. The starter implemented the grounding for the learning for the remainder of the lesson. Resulting in each element of the lesson progressively evolving the pupils knowledge.
The variety of activities within the lesson was rich, as a significant amount of the pupil's time was spent out of their seats engaging in group tasks appointed by the teacher. Although, in order for this exertion to be successful prior knowledge of the class is key, the teacher must be aware of how the class react to active activities. In order to have a successful lesson the teacher must be sensitive to the pupil's needs and understanding. The teacher must be flexible with the timing as the time they may have allocated within the planning process may not be that in reality. My observation revealed there was a high level of compucy demonstrated by the teacher in this area as all students seemed to have kept up with the pace of learning.
Moreover, in order for the timing to be effective; initially a well thought out lesson plan must be in place. Also, the teacher must be adaptable and versatile,  as not sticking to the lesson plan rigidly enables the learning to be successful. Although a lesson plan may not be a teacher's Bible, it is a scaffold for the lesson and must be in place for good timing and an effective lesson to occur.