One thing that I found challenging is to try to correct some less than desirable habbits that student come into class with. I guess when you follow the rules in your own class and in previouse classes the students are not held to the same standard. It is very dificult to get them back on track so you can get back to what they are there for.Some classes this is not an issue but others this takes up valuble time. What are some techniques that work?