The role of teachers has changed from the past to the present. In the past, teachers were seen as the sole source of knowledge and authority figures, while now they take on facilitator, supporter, and advisor roles. As technology and information access has increased, teachers are expected to develop students' skills, understand individual needs, and continually expand their own knowledge base. The ideal 21st century teacher will be understanding, well-prepared in their subject and teaching methods, able to facilitate both classroom and online learning effectively, and open to students' needs in a changing digital world.