Hello! I received my master's of education completely online so it was easy for me to teach full time and also go to school full time. It just depends on what you want to do. I found that online learning is easier (and less stressful) than having to drive to a university and sit in a classroom after a full-day of teaching. Plus, the classes were structured so that each course lasted only 5 weeks, with a week-long break in between each course. Now, I am a doctoral student who is also attending school completely online once again, through the University of Buffalo. I have found that doctoral courses are much more time-consuming and require more time than that of master's coursework, and it's much more demanding overall. Therefore, I did quit my full-time teaching job which was a HUGE sacrifice, but I do receive support from my university in the form of a Graduate Assistantship, in which I assist one of the professor's with research-related tasks up to 20 hours a week. I certainly do miss my teaching salary though! You have to be willing to make that kind of sacrifice for possibly up to 4 or more years, if you do wish to pursue your doctorate. I hope I have helped!