1. Affect appetite: Children may feel nervous, anxious or afraid when they are criticized or reprimanded during meals, thus affecting appetite and digestion. In the long run, it may lead to malnutrition in children.

2. Destroy the family atmosphere: The dining table is a place where family members get together to exchange feelings. If you educate at the dinner table, it will make children feel stressed and uncomfortable and destroy the harmonious atmosphere of the family.

3. Can't concentrate: When eating, children should focus on food and don't be distracted by parents' teaching. This is not only bad for children's digestion, but also bad for children to absorb knowledge.

4. Lack of respect: Educating children at the dinner table may make them feel that their parents don't respect their feelings and needs. This may lead to children's antipathy and resistance to their parents and affect the parent-child relationship.

5. The effect is not good: the environment on the dining table is not suitable for education. Children may be unable to concentrate on class because of the influence of the environment, which will greatly reduce the effect of education.

6. Imitate bad behavior: If parents often educate their children at the dinner table, children may imitate this behavior and bring this education to other occasions, such as school and friends' homes, which is not good for their growth.

Therefore, parents should educate their children at other suitable times and occasions, such as bedtime stories and weekend activities. This can not only ensure children's physical and mental health, but also promote the harmonious development of parent-child relationship.