Medical assistants perform clinical and administrative tasks to keep a health practitioners office running smoothly. Formal training in a medical assistant program is preferred but not required, and many medical assistants receive their training on the job. Medical assistants can be certified by various associations, such as the Association of Medical Technologists (AMT) and the American Association of Medical Assistants (AAMA), which can lead to improved job opportunities and salary. The U.S. Bureau of Labor Statistics expects medical assistants job growth to be among the highest in the country, at 34%. In 2008, the median medical assistant salary was $28,300.