a guy writing on a chalk board
a man is teaching a class
a man lectures a classroom
a man teaching students in class
a man writing on a chalkboard in classroom then talking and sitting in a chair
a professor teaching a class
a teacher giving a lecture
a teacher in a classroom writing something on a board
a teacher is talking to students
a teacher is writing information on a chalkboard
a teacher talks about teaching
a teacher writes on a chalkboard
a teacher writes things on a chalkboard
a video of a teacher writing on a chalk board and being interviewed
guy writes on a chalkboard
person writing on board
taneli nordberg english teacher teaching class to students
teacher writes on the chalk board
a man lectures a classroom
a teacher talks about teaching