The most important prerequisite is a willingness to work at making the Christian faith appealing and approachable for children and adults. Our teachers are Christians who are living their faith in a way that helps others to find theirs. As a parent, you are the most important person in your child's life. Taking an interest in the lessons they learn in Sunday School is very important. Take a few minutes when you get home and ask about what went on that day, look over the story papers together, admire the project they worked on.
Children also learn by example.
Staying in touch with your own Christian faith in ways that are visible to your child will be the most powerful reinforcement of the lessons taught in Sunday School. Attend an adult class. Volunteer to substitute for your child's teacher. Provide some of the craft materials needed for a lesson. Send along a box of crayons or markers.