It’s said that the best professors awaken greatness in students, and inspire them to reach their potential both in their careers and in life. Postsecondary teachers, often called professors or faculty, teach students at the college level, in a wide variety of subjects, and often contribute to the development of knowledge in their fields. Professors need high-level critical thinking skills, excellent speaking and writing skills, creativity, and the ability to connect with their students. They teach courses in subjects such as history, science, business, music, and many other fields. Professors at small colleges or community colleges often spend most of their time teaching classes and working with students. When employed by large colleges or universities, faculty also conduct research or experiments publish their findings, apply for research grants, and supervise graduate teaching assistants who help teach classes Part-time—or adjunct—professors often work in their field, such as a lawyer who teaches an evening law class. Some faculty teach courses online, using the Internet to present lessons, assign work to students, and participate in discussions. Faculty also keep office hours for student meetings, and may serve on committees for their institutions. Most professors teach during the day, but some teach night and weekend classes. Online teaching may offer a flexible schedule. Typically, postsecondary teachers must have a Ph.D. in a related field, though two-year colleges may require only a master’s degree. In some fields, such as health specialties, art, or education, hands-on experience in the industry is an important qualification.