Many online tutoring services appear to offer similar quality education, but looks can be deceiving. When deciding which online tutoring provider for yourself or your family, it is best to first isolate what features are "must haves", and what is nice to have.
These requirements differ depending on tutoring subject, age of student, and interface (computer, tablet, phone, etc.). As a general rule of thumb, the more features the better, because you never know when you need to just share your screen with a tutor, or get a tutor right now for a quick question. So without further ado, here are my personal necessary features for a tutoring service.