I'm a professor who looked into WyzAnt for a neighbor. The site claims to have "certified" tutors who go through a "rigorous testing process" using exams made by "professional educational services." I registered as a WyzAnt tutor (my degree is in premodern Chinese history), and in less than 2 hours I was "certified" in over 40 subjects, most of which I have almost no formal knowledge. My conclusion is this agency will certify any living organism as a professional tutor.