Term 2 Wk1 Mon - 4E5 AMaths - Differentiation

Started this term with Differentiation using the first principles. I've used three chapters material to start differentiation (involving alegrabic, trigo and exponential expressions). I believed this is a better approach for the students to learn differentiation for a start instead of concentrating on each topic later. Students seemed more eager to practice in this 2 period lessons. Maybe the students knew that the Mid year exam is near. However, there were still some students who  refused to cooperate in class in their learning. They are the usual ones who are disruptive in lesson or have no respect for authority. I've sent one sitting outside the classroom entrance to isolate him and help him to focus in his learning. This 2 period lesson was spent on drilling the students on the basic techique in differentiation. We managed to go through about 15 questions. Some students were eager to use chain rule to solve some of the question. It could be that they have it elsewhere. Discovered that these students were taught the improper sequence of the differentiation technique. No doubt it is good that their "outside tutor" have taught them in advance, but it is not known if the students have mastered the basic skills.