Get rid of all the charts, rewards, gimmicks, etc. - start your daily routine with a brief meeting in which the students and you discuss community-building ideas, problems/solutions, and rules and guidelines for the class. Use that time to develop vocabulary and role-play about concepts such as respect, cooperation, and responsibility. Deal with individual discipline problems using a "plan" in which the child identifies and writes the problem and a plan for a solution. For specific ideas along these lines, read books by Barbara Coloroso and Ruth Charney.