Children cannot be expected to follow the rules if they do not know or understand them. The only way to ensure understanding is to provide the rules in a clear and concise manner that is appropriate for the age and developmental level of the children. Post rules where they are visible to the class. Young children benefit from rules that are provided in picture form. Older children who can read may have written rules. Repetition is the key to learning, so review the rules at the beginning of each day. Have students take turns reading and explaining them to ensure comprehension.
The key to any classroom behavior management system is consistency. The best system is ineffective if it is not implemented the same way and with every target behavior. Even young children subconsciously recognize if they "get away" with an inappropriate behavior, thus the misbehavior is likely to be repeated. If the chosen system is difficult to maintain on a consistent basis, then you may need to get a less complex system.
Provide positive reinforcement immediately in order for it to be effective, particularly for young children. The key word is "immediately." Waiting until the end of the day or until a parent can come to the center to address the behavior will have limited results. By this time, the child has engaged in multiple other behaviors, and it may be unclear to the child what behavior is being addressed, even if reminded. Also, if the child has exhibited appropriate behaviors while waiting, these behaviors may be affected by the consequences.
Positive reinforcement is effective for encouraging appropriate classroom behaviors. Stamps and stickers are appropriate for young children. Use removable sticker charts and provide stickers for each appropriate behavior, and remove stickers as a consequence when children break the rules. Children who receive a specified number of stickers may get a reward at the end of the day, such as a hand stamp. Privileges are appropriate for older children. Instead of stickers, use wall pockets and craft sticks or index cards to reinforce appropriate behaviors. Rewards may be extra recess time, computer time or a special snack.