According to the theory of social learning developed by Albert Bandura, modelling is a principal way for children to learn. This theory emphasizes the importance of observational learning and the influence of social factors on cognitive development.

Observational Learning:
- Albert Bandura proposed that individuals learn through observation and imitation of others. This process is known as observational learning or modelling.
- Children observe the behaviors of others, particularly those they perceive as role models, and learn from their actions and consequences.
- Through observational learning, children acquire new skills, knowledge, and behaviors without necessarily engaging in direct practice or experiencing the consequences themselves.

Role Models:
- Bandura argued that children are more likely to imitate behaviors they observe in individuals they perceive as similar to themselves or as having desirable qualities.
- These individuals, known as role models, can be parents, siblings, peers, teachers, or even media figures.
- By observing role models, children learn about appropriate social behaviors, problem-solving strategies, and ways to achieve goals.

Key Factors in Observational Learning:
- Attention: Children must pay attention to the model's behavior in order to learn from it. Factors that influence attention include the model's characteristics, the complexity of the behavior, and the situation.
- Retention: Children must be able to remember the observed behavior in order to reproduce it later. This involves forming mental representations or cognitive models of the behavior.
- Reproduction: Children need the physical and cognitive abilities to reproduce the observed behavior. They must also believe that they are capable of performing the behavior successfully.
- Motivation: Children are more likely to imitate behaviors that are reinforced or rewarded. They also consider the consequences of the behavior and the social approval or disapproval associated with it.

Implications for Learning and Education:
- The theory of social learning suggests that providing positive role models and opportunities for observational learning can enhance children's learning and development.
- Teachers can serve as effective role models by demonstrating desired behaviors, such as empathy, cooperation, and problem-solving skills.
- Creating a supportive classroom environment that encourages collaboration and positive peer interactions can also facilitate observational learning.
- Integrating modelling activities and opportunities for observational learning into the curriculum can enhance children's understanding and acquisition of new concepts and skills.

In conclusion, according to Albert Bandura's theory of social learning, modelling is a principal way for children to learn. By observing and imitating the behaviors of others, particularly those they perceive as role models, children acquire new skills, knowledge, and behaviors. This has important implications for learning and education, suggesting the need for positive role models, opportunities for observational learning, and a supportive classroom environment.