1. Building trust: First, parents need to build a trust relationship with their children. This means that parents need to listen to their children's thoughts and feelings, respect their privacy and keep their promises. When children feel trusted and respected, they are more likely to express their thoughts and feelings honestly.

2. Provide positive incentives: Parents can encourage their children to be honest by providing positive incentives. For example, parents can praise and reward their children when they tell the truth. This can help children realize that honesty is a commendable quality.

3. Make clear rules and consequences: Parents need to make clear rules and consequences to help their children understand the consequences of lying. For example, if children are caught lying, they may be punished, such as losing certain privileges or taking on additional responsibilities.

4. Lead by example: As parents, we need to lead by example and show honest and upright behavior. When we are dishonest, children may imitate our behavior. Therefore, we need to ensure that our behavior conforms to the values we want our children to follow.

5. Help children solve problems: Sometimes, children lie because they don't know how to deal with problems or avoid trouble. In this case, parents can help their children find solutions to problems and teach them how to deal with difficulties and challenges.

In short, educating children who lie needs patience, understanding and support. By building trust, providing positive incentives, formulating clear rules and consequences, setting an example and helping children solve problems, parents can help their children cultivate honesty and integrity.