Final answer:
Amanda's teacher's reinforcement schedule can be described as a variable interval reinforcement schedule.
Step-by-step explanation:
Amanda's teacher's reinforcement schedule can be described as a variable interval reinforcement schedule. In this type of schedule, the reinforcement (quizzes in this case) is delivered based on varying amounts of time, which are unpredictable. The student receives quizzes anywhere from every three days to every three weeks, with an average of about one every two weeks. This schedule keeps the student engaged and motivated because they never know when the next quiz will come.