Dallas Medical Assistant School - Addison incorporates the NHA Medical Assistant CCMA study guide as the core textbook resource, provided to students without any extra charges. The school focuses on ensuring that students are adequately prepared for their externship by week 14 of the program. Successful completion of an 80-hour externship at a nearby medical practice is a requirement for Dallas MAS-Addison students to obtain their certificate of completion. Students are given the choice to either select an office for their externship or be assigned to a suitable local medical practice to fulfill this externship requirement.