Within most courses, there are practice quizzes and major exams.
Typically, the practice quizzes can be done at home and are for your own practice (though they may count towards your final grade in a minor way).
The major exams (eg. Unit Exams, Module Exams, Midterms and/or Finals) must be done in a controlled environment to ensure the quality and authenticity of your final course grade.
These exams have passwords attached to them, which can be entered by an approved invigilator.
Your online school: Contact your teacher to set up a time to write the exam.
Home School: If you are a student at another school, you can often write an exam with a local teacher. Ask around and see if you can arrange a time to write your exam.
Other: If the first two suggestions do not work, you are responsible for arranging an invigilator. Other online schools within the province will accomodate you. You can ask within your home school or college for a volunteer invigilator. Direct family is typically not approved. Once you've arranged an invigilator, simply ask him or her to e-mail your teacher from his or her work account. If approved, your teacher will supply the necessary information for assisting you with your exam.