Find a school that is hiring online educators. Online schools will usually have an "Employment" section where people interested in obtaining a job can put in their resumes. However, many of these universities require that applicants have at least a bachelor's or master's degree in the field they wish to teach. Read through the requirements to make sure you meet them before applying.
Apply for the job. Submit your resume inclusive of your education level, work experience and any other pertinent information that supports your desire to be an online educator.
Read through the syllabus for the class. After getting hired to teach a particular course, you may be given a syllabus or outline for what should be covered. Read through any books or other associated materials you will use to teach the class.
Log in to your virtual classroom. While different online universities have different methods of teaching, generally there is a closed circuit loop where students and teachers log into the site. The students can see the teacher through video conferencing software embedded into the site.
Teach the course. Once students have appeared in your virtual classroom, teach the course as you would in a classroom. Have wipe boards or other visual aids already in place before the start of class. As tests arise and papers are due, communicate with the students via the university or personal email system.