I just had a rough class of high school seniors - government/civics class - who were totally unmotivated - it's that time of year - spring semester. As per the sub instructions, I distributed some vocab words and an in-class worksheet for them to do. Some, however, did not want to do that, and worked on classwork for other classes. I had to redirect several of them to do the work for this class; some were cheeky enough to tell me excuses such as "Hey, I have an exam in that subject, and I can do that for homework", or "I'm not bothering anybody, why are you busting my butt on this?" It got to the point where I had to stare down one particular student to start work on the classwork, and when I caught him doing his English homework again, I had a confrontation with him - essentially told him he had an alternative of doing the work that was assigned, or to "take a hike" (leave the room) if he felt that he couldn't comply. It got to the point where he felt he had to stand his ground (and lose face in front of his classmates) and he was very mouthy with me, said as a sub, I didn't have the authority to order him out of the classroom (wrong, wrong, wrong - I could have told him the California Ed Code does empower me to do so, and the last student who thought I was "only a sub" earned a referral and suspension). I was about to call for the school office to escort him out of the classroom when fortunately, the campus security guy came by, and hustled him out (to cool him off - it didn't come to the student in question getting sent to the AP and triggering the referral procedure). I have this class again on Monday. I have a question - should I address this class about my expectations for their behavior in class that I expect them to be on task, and give them a heads up that I will not hesitate to address any defiance of my instructions with appropriate measures)? Or would something like that backfire?