No, All of the information you will need will be covered in the single orientation that you are assigned to attend. If your classes are in two different subject areas, you will simply need to go and meet with the other teacher and let them know you completed the Orientation assignment in another class. You will receive credit in both classes, by simply submitting the same assignment for both classes.
You are also responsible for learning about any specific requirements that might be unique to each of your two classes. By meeting both teachers on Orientation day, you will get any handouts or information necessary.