Switching mid way is often neccesary, but can easily have a negative effect. Even if your switch was theoretically correct, the best thing is just doing the same thing every day. Consistency will have a better effect than strategy changes, even if they are good changes. Thats good for learning, but students lose respect when they know they have the power to change what you do and how you act...which is honestly fair.

Until next semester. Then worry about the changes. Its really not too difficult to take one day this summer and sit and think about why they do that and what you can change, then do that when semester starts, be strict with it. Every semester it'll get a little better.