Professor teaching science to students in a classroom using pen and paper
A college professor teaching his university students
Dedicated educator tutoring students in math and science in a private classroom session
Professor using a chalkboard to teach a science chemistry class, asking questions and pointing to have a student answer
Professor teaching a student math/science in a college/high school classroom
Teacher asks students questions in school classroom
Portrait of Young Female Teacher in Classroom Giving a Lecture Class Using a Blackboard with Mathematic Formulas to Explain. College Science Professor Teaching, Talking to her Students