There are many ways to help our child walk through the process of conscience development. I have found several articles and will provide the link.
The first is FAS/E and Conscience Development by Teresa Kellerman.
Do the Right Thing by John Faull.
Teaching Kids to Develop Conscience by Ann Leedom.
RadKid.org has an excellent article about conscience development.
In our house hold spiritual development is important as well. There is a spiritual reason for our conscience development, an answering to God, a fulfillment of why He put us on this earth. We listen to Christian music often and the kids will sing along, we go to church where they hear they are loved and Divinely made. They are not an accident but a creation. Many of our children missed stages of conscience development because they were in crisis. When a child is in crisis they skip whole stages. If you can read through the article on RadKid and figure out where your child is in their development it gives a starting place. Then you can have a healing day!