If you believe in your dream you once held of becoming a teacher, you will be a better one than you are now. If you can visualize something to do in your classroom to spread your belief, the whole class will benefit. Remember that you work with children who have not seen much of life or the world. They see life through your eyes many times every day. What is important is not what you think your boss sees or what your colleagues see, but what they see. The fire you ignite in their hearts, minds, and eyes is the fire that leads the civilization of tomorrow. You have the gift to work with kids, now make sure you take the time to meditate on what is best and profitable to them and for them. I know from personal experience this is an incredibly rewarding direction to take.
Teach with vision, believe in your dream.