Bis forBlackboard
A blackboard, or chalkboard, is a surface you can write on in chalk. Blackboards are usually used in classrooms or to write menus in restaurants.
A college is a place of higher learning, similar to a university.
You enroll in something when you are added to a list, or roll.
Enrolling is usually used to mean signing up for some kind of course of education at a school or university.
Exam is an abbreviation of the word examination. An examination is a test or investigation of something. At school, you may take exams to test your knowledge. A doctor may give you a physical exam to check your health.
Mis forMortarboard
A mortarboard is the headgear traditionally worn at graduation ceremonies.
A principal is someone who runs a school, doing more administrative work than teaching. In some countries, a principal is called a headmaster or headmistress.
A student is anyone who is actively learning something, usually by attending a school, college or university.