Middle aged male teacher of mathematics drinking coffee and using laptop computer at work when delivering lecture on calculus to multi ethnic group of students
Young student discussing work with math teacher in lecture hall
An old woman, the lecturer gestures hands when talking
An old woman, the lecturer gestures hands when talking
An old woman, the lecturer gestures hands when talking
An old woman, the lecturer gestures hands when talking
An old woman, the lecturer gestures hands when talking
Handheld medium shot of middle-aged teacher of mathematics holding cup of coffee and having friendly conversation with multi ethnic group of students after lecture
Handheld shot of middle-aged teacher of mathematics talking to multi ethnic group of students standing around him and answering their questions after lecture on calculus
Smart students surrounding a male lecturer professor, sitting at desk and watching seminar on laptop
Medium shot of middle-aged teacher of mathematics standing at blackboard with equations written on it and explaining topic to students during lecture at university
Medium shot of smiling middle eastern man holding takeaway coffee cup and talking to group of students before mathematics lesson, handheld