1518
activity
adolescents
african
animated
attention
black
blackboard
boys
caucasian
class
classmates
clever
college
comfortable
curiosity
desks
enjoying
european
feeling
females
friends
girls
group
improvement
indoors
information
intellectual
interest
learning
lessons
males
multiethnic
pastime
pupils
school
smiles
students
studies
subjects
teenagers
time
university
white
young
youth