Enthusiasm is your keyword
The attitude with which children tackle their lessons is often a reflection of their teacher’s attitude. Therefore the importance of showing enthusiasm can not be overstressed.

Learning should be an interesting, challenging experience that lasts even beyond the time the pupil attends school. If the interest and ambition to learn is not instilled into the child when he is young, there is a danger that he will never really enjoy learning. Though a child’s education begins long before he starts to school, you must remember that his first actual experience in book learning lies in his teacher’s hands. How she guides him could very easily determine the type of pupil he will be throughout his years in school. And it does not stop there. One writer said, "As the morning is to the day, so is the child to the man." As we can expect a bright, sunny morning to turn out to be a nice day, an industrious, willing pupil can be expected to become just that type of grown-up. 

Since a teacher’s enthusiasm rubs off on her pupils, you should never be afraid to say, "This page looks interesting.  You’ll like doing it." Never, never tell students their work isn’t hard or it isn’t important. Let them feel as if they have accomplished something, even if it is only a simple lesson. In order to be effective, the teacher must see the lessons through their students' eyes. She must imagine herself in their place and take an interest in the things that interest them. It is only when children have gained confidence in their teacher and confidence in themselves that they enjoy school. And only when they enjoy school will they tackle their lessons with enthusiasm.