academic
algebra
asia
asian
broadcast
camera
chinese
class
classroom
covid19
distance teaching
education
elder
elearning
engineering
equation
explain
formula
graduate school
internet
lecturer
lesson
live
male
man
math
mathematics
mature
method
old
online
people
physical
pointing
professional
professor
record
remote
school
senior
solving
teacher
teaching
university
video
white board
whiteboard
定額
Asian mature male professor having online class is using digital video camera record during teaching math course at graduate school to prevent coronavirus infectionの素材 [FY310163409883]
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