Disagreements can happen in any workplace. What matters most, is that you are able to come to a compromise and continue working professionally, despite disagreements. Additionally, it is common that the teacher you would be working under would be your direct report. So, at the end of the day, you are working in their classroom and you should follow their lead. That is not to say that the paraprofessional cannot speak up and voice their opinion, but their role is to support the teacher and the students in the room. Be sure your example here highlights how you are able to come to a resolution and continue working collaboratively with the teacher.