Explanation: Piaget stated that children in the pre-operational stage often display egocentric thinking and have difficulty seeing situations from another person's perspective.

Explanation: The concrete operational stage, generally from 7 to 11 years, involves logical thinking about concrete objects and events.

Explanation: Children generally develop the ability to understand conservation during the concrete operational stage.

Explanation: Jean Piaget proposed four stages of cognitive development: sensorimotor, pre-operational, concrete operational and formal operational.

Explanation: The Zone of Proximal Development (ZPD) refers to the difference between independent performance and performance possible with guidance or assistance.

Explanation: Vygotsky emphasized that social interaction, language and cultural context play important roles in children's cognitive development.

Explanation: Kohlberg's theory focuses on the development of moral reasoning and judgment.

Explanation: At the pre-conventional level, moral decisions are often influenced by punishment, rewards and personal consequences.

Explanation: Learning by doing emphasizes active participation and direct experiences as important means of learning.

Explanation: In constructivist classrooms, teachers facilitate learning by providing experiences, questions, guidance and resources.

Explanation: Errors can reveal misconceptions. The teacher should identify the underlying difficulty and provide appropriate support.

Explanation: Diagnostic assessment is used to identify prior knowledge, misconceptions and learning difficulties.

Explanation: Howard Gardner proposed the theory of multiple intelligences, identifying different forms of human abilities.

Explanation: The teacher should understand the specific difficulty and provide suitable instructional support without labeling the child.

Explanation: B. F. Skinner developed major principles of operant conditioning, emphasizing the role of consequences in behaviour.

Explanation: Positive reinforcement involves presenting a desirable consequence after a behaviour to increase the likelihood of that behaviour occurring again.

Explanation: Questions asking students to explain reasoning, evaluate ideas or justify solutions encourage higher-order thinking.

Explanation: Connecting new information with prior knowledge helps students develop meaningful understanding.

Explanation: Learning to interact, cooperate and build relationships with others is part of social development.

Explanation: Asking the child to explain the reasoning can reveal their thinking process and help the teacher understand possible misconceptions.