Why I want to be a dentist is because that interests me. What dentists do is clean your teeth and make sure you don't have any cavities.The beginning salary of a dentist is $105,600 for Nebraska. Some classes that would be helpful in highschool would be health, science, math, chemistry, biology, and algebra. The college you need is a Bachelor's degree and at least 4 years of dentist school. Dentist is in the health science cluster. A dentist sounds like an interesting job for me.