Many students feel like they are the only one that has a question or the only one that doesn’t understand something in class, but that is very rarely the case. In fact, your instructors expect you to ask questions!
If you take a class offered online, it's a good idea use the preferred method your instructor recommends but don't be afraid to ask questions as they arise. Since the delivery method is different to what most students are used to, online students may ask questions to understand the material and to be able to successfully navigate through the course, in addition to asking questions about assignments or the material covered in the course.