Teachers use lots of encouragement and emotional support in communication with the child. We focus on celebrating effort, emphasizing the successes of the child. We never punish for failure in order to make a child comfortable with failing as part of the learning process.
That includes dopamine system work. As well as your child receives emotional and physical (presents, sweets, hugs ect) award it bursts dopamine generation and makes the brain repeat the iteration again. Award by award the brain starts to form a strong neuro net of effective learning. "Learning is funny, it's pleasant, it's amusing" etc.
"Dopamine cell firing can encode errors in reward prediction, providing a learning signal to guide future behavior. Yet dopamine is also a key modulator of motivation, invigorating current behavior." (Source
) This means that rewarding our students will help them get motivated to be more engaged in learning as well as give them an opportunity to understand where they are in the program and help themselves set goals for the long term.