Your safest bet for an online college, university, or vocational school is one that is a regular brick and mortar school that also provides online courses. These are real places, where real students and teachers are in attendance, not some fly by night fake degree mill. I would be suspicious of any online degree program that does not originate from a regular college, university, or vocational school. Many regular schools now have online courses, and some of them even offer some of their courses for free, but the free courses usually don't include a degree or certificate. However, taking courses online saves money on transportation, dorm costs, food, and other expenses, so even paying for the online courses is still a good deal for many people, and also can be more convenient, too.
Do check out carefully, what ever online schools you are interested in signing up with. This is a good education option for many people.
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If a man does not keep pace with his companions, perhaps it is because he hears a different drummer.
Let him step to the music which he hears, however measured, or far away.--Henry David Thoreau