A teacher is a professional who is responsible for facilitating learning and instruction for students in a classroom or educational setting. we develop and deliver lesson plans, assess student progress, and provide guidance and support to students as they work to achieve their learning goals. Teachers may work with students of all ages, from early childhood through to high school and college, and may specialize in a particular subject area such as math, science, or English. In addition to their instructional responsibilities, teachers may also serve as mentors, role models, and advocates for their students.