Kids Are Master Manipulators. So Use Game Theory Against Them

For siblings who refuse to cooperate with each other, assign them a task that they can do as a team, like picking up the toys.

Over time, this will compel them to work together.

Who will get the bigger room? Who gets to name the cat? Have the kids bid for it with their chores or allowance.

Don't make threats that will make you suffer too. "Don't make me turn this car around!" Pick punishments that benefit you. "If you continue, we're going to Grandma's instead of the movies."

If you suspect your kids haven't done their homework, ask many specific questions: Which subject? What did you learn? How long did it take? What was the hardest part? The act of maintaining an elaborate lie will discomfort them. Telling the truth will be easier.

When your kids are in some trouble and crying bitterly, don't bail them out of trouble. It will reinforce bad behavior. Establish clear rules and meet out punishment when necessary.