Occupational therapist assistants generally must complete an associate degree or a certificate program; in contrast, occupational therapist aides usually receive most of their training on the job. Employment is projected to grow much faster than the average as demand for occupational therapy services rises and as occupational therapists increasingly use assistants and aides. Job prospects should be very good for occupational therapist assistants; job seekers holding only a high school diploma might face keen competition for occupational therapist aide jobs.