An online bachelor degree can be earned as quickly or as slowly as you can finish your required credit hours. For some, only a part-time schedule is feasible. However, for those who work diligently and can put in extra hours, an online bachelor degree could only take two or three years. Given you are 18 when you graduate high school, you could become a certified teacher at the young age of 20. Online degrees are perfectly designed for the older student and the returning student, as well. Older students may be in a bigger rush to complete a degree and get their foot in the door. No matter how long the degree takes, you will see that the time invested in an online bachelors degree has been well worth it.