20s
30s
4045 years
40s
academic
adult
africanamerican
american
blackboard
cameroonian
caucasian
chalk
chalkboard
class
classmate
classroom
college
communication
education
explaining
french
group
indoor
information
instructor
kenyan
knowledge
learning
lecture
lesson
listening
male
man
nigerian
occupation
person
professor
pupil
school
sitting
standing
student
study
talking
teacher
tutor
university
writing