For each instructor position, you take a different online test. Teaching SAT is one test, GRE is another. If you pass the test, someone from the office will contact you. I've been through this process twice (having worked for the company in two stints). Because you have already gotten through one of their screening processes they will take you seriously as an applicant and explain the rest of the process up front. If you live close to the local office they may ask you to come in and demonstrate teaching something simple to the office staff (this happened on my first stint). They will be looking to see if you are friendly and if you involve your audience. Do not stand and talk at them. Do ask questions, get responses, create conversation and use it to get your point across. After this point, they will sign you up for a training based on what you want to teach. The training is paid and it may require travel (they will reimburse all expenses). It usually is scheduled over weekends and may take as many as two weekends. Mostly you will be taught the content and you will give practice lessons back to the trainer. Your job during this phase is to learn the material and demonstrate that you can teach it to the trainer's satisfaction. Generally, if you are teaching anything other than MCAT the trainings are pretty laid back. Teaching MCAT demands more from the instructor, and the intensity of the trainings (those I have been through and those I have heard about) reflect this. If you are an inexperienced teacher, I recommend starting with SAT or ACT and then migrating over to other subjects as you get some experience.