I developed this check-in, check-out system for a couple of my middle school homeroom students who were having trouble throughout the school day in multiple class, and particularly in transitions. At the end of every class, the student has to get the teacher to sign-off on his/her behavior in six key areas (defined at the bottom). The teacher scribbles a quick 'x' or 'check' and then initials. There's also space for comments, if the teacher feels the need to elaborate. At the end of the week, the front-to-back page goes home with the student to be signed by a parent.
The obvious merit of the system is that it makes behavior monitoring and recording over time simple and quick, and gives both students and parents feedback on a regular basis. Once the form returns to school, the teacher can file it away for record purposes if need be, as well.
I have found, however, that when it can be tied to a consequence or privilege at home or at school as well, that is most helpful.
This system could also be used with upper elementary students in self-contained classrooms, by changing the class periods to subjects or time-frames during the day.
Please Note: The document is in a .docx file, so that it can be edited for a student's particular class schedule or needs.