adolescence
1618
2634
activities
adult
african
american
attentive
black
boy
caucasian
classes
college
control
credits
curious
desk
exam
female
girl
indoors
informative
inspection
interesting
lectures
lessons
male
man
monitoring
multiethnic
observation
process
professor
pupil
question
revise
school
student
tasks
teacher
teenage
testing
university
watching
white
writing
young
youths