Discipline is necessary in every household. The goal of discipline is to help kids choose acceptable behaviours and learn self-control. They may test the limits you establish for them, but they need those limits to grow into responsible adults.
Establishing house rules helps kids understand your expectations and develop self-control. Some rules might include: no TV until homework is done, and no hitting, name-calling, or hurtful teasing allowed.
You might want to have a system in place: one warning, followed by consequences such as a “time out” or loss of privileges. A common mistake parents make is failure to follow through with the consequences. You can’t discipline kids for talking back one day and ignore it the next. Being consistent teaches what you expect.