Nail technician courses can teach you what you'll need to know about the job and passing the state licensing exam. These courses will teach you the theoretical aspects of nail care, including information about nail art, marketing skills, nail disorders, manicures, pedicures and client relations. Nail technician courses will also teach you the hands-on aspects of nail care while giving you plenty of practice on live subjects. Avoid schools that promise course completion within a month--you'll want plenty of time to hone your craft. All of the information the course is teaching you will be helpful when you take the state licensing exam.