My parents have way more children than you do, and they focus on attitude. Not behaviour. I turned out mature, didn't I? Maybe you could learn from them.

how old are they? a lot of times i notice parents don't want their kids to grow up no matter how old they are. remember also that rebelling is a sign of growing up. they need to make their own mistakes to learn the correct way to do things maybe with the older ones its time to let go a bit.

at the end of the day, you can only teach your children right from wrong - after that its up to them to choose which way they are going to go. Try to remain consistent in your behaviour with them, even big kids need ground rules and to know where their boundarys are?

If you think that they have some sorts of behavior troubles that cannot be managed by your parenting style, then you do have to change your style. Parenting is a hard job and with 6 children, you definitely need to adopt some effective behavior intervention program or plan. Like the total transformation by James Lehman or Home Intervention System. Home Intervention System is a very effective behavior modification program for children age 5 or above. It will help you deal with a wide range of problems that children often encounter including; anger, substance abuse, school issues, self-esteem, arguing, motivation, interacting with family, and more. Parents, teachers, school counselors, grandparents, and any other individuals who frequently interact with children will benefit from techniques and concepts presented by the Home Intervention System. There's not much you can do as a Parent until your child is properly motivated. No Parenting technique, approach, talk, or change on your part will work until your child is motivated to listen to and follow your directions. Most children don't lack the ability to obey their parents or follow rules, they simply lack the motivation to do so. The Home Intervention System was developed by administrators of schools and programs for struggling youth and has been adapted for home use. The Home Intervention System shows you how to motivate your teen to make changes just like they do in these schools and programs. The System utilizes a simple but powerful Attitude and Behavior Modification Program. Informative Ref: http://homeinterventionsystem.com I hope it helps..Best wishes..

The answer is actually in your question. Yell and Punish. Have you ever thought about it they might misbehave because they want your attention? I do not blame you, six kids is working hard day and night. Try to ask them what they expect from you. Trust me, they will come with an answer that will probably break your heart. (in a positive way). Try to create routine and make sure you have one on one time with every kid every week. Sometimes kids just want to be with you, but all you do is run around trying to run the house, which is only normal, but they also want special time with mom or dad. Just ask them what they would want to change in the family. It will work.