When children are young, they follow your values because they have to.  You can control much of what they do, say, watch, hear, etc.  But as they mature, they will begin to identify with the culture, their peers, teachers, coaches and others outside your home.  They will develop their own set of values that they live by or they will fluctuate with the situation.  If you want your child to have a set of values they live by, help them name them, develop them and own them.  Here is an activity to get you started (this activity can be done over several meal times or bedtimes or all at once with older children):
 
Discuss the meaning of the word "values" with your children.  Values are principles, standards or characteristics considered important or desirable.  Values exist at individual, family and cultural levels.  For example, as an individual, an important value may be striving to always do your best.  In your family, a value may be to respect others.  Our culture has values that may be the same or different from your family values.  An example of this is wealth.  Americans value wealth; this may or may not be an important value to you and your family.  Values can differ between people, families and societies.
 
Explain that as a family, you want to be followers of Christ who love God, love others and serve the world.  Values will help you stay on the right track.  Around age 11, your child will start to develop their own identity separate from the family.  This is a natural part of development.  If you have given them a set of values and helped them imagine the type of person they want to be, then they will be less susceptible to the influences around them.
 
First, on a large sheet of paper, create a list of values, both good and bad.  Start with some examples like the fruits of the spirit found in Galatians 5:22.  Add others like wealth, competition, success, sex-appeal, justice, grace, generosity, respect, health, etc.  Then draw two columns on a piece of paper and label one column "positive" and the other "negative."  Begin to discuss the values on the list and put them in the appropriate column.  After you have a list of positive values, pick the top 3-5 that are most important to your family.  If your child is older, let them pick some for themselves.  Talk about how we live these values out.  For example, what does it look like to be a person who values health or generosity?  Give lots of examples of ways to live by these values.  Make a commitment to each other that you will all live by these family values.  Maybe even write out a simple covenant or promise that you all sign.  Post the covenant or your list of values somewhere where everyone will be reminded of them.  Point out those values in action when you see them in your family and in others.  Gently remind each other when someone is not living according to those values.