We ask that all cell phones and email be completely turned off during class and that students use the numerous breaks and lunch to take care of any business. If attendees need to leave class they are free to do so but we ask that they leave quietly and not disturb the class.
We highly recommend that attendees not do this for several reasons:
They may miss information that is critical for the certification exams.
The instructor will not spend class time reviewing anything they miss, so if material is dependent upon something they have missed it may be difficult for them to understand it.