National Learning Corporation has been a leading publisher of test-preparation Passbooks® for more than 50 years, with 6,000 titles available across 22 series. The Occupational Competency Examinations are designed for those experienced in skilled trades or occupations who need to present objective evidence of their competency to become vocational teachers, to secure teacher certification or to obtain academic credit from a higher institution. Each book offers practice through multiple-choice questions and answers in relevant subject areas, as well as informative texts to aid in understanding the study material.