1215
5059
aframerican
afroamerican
assistance
blackboard
caucasian
class
classroom
community
concentration
desk
education
english
exam
exercises
expertise
females
group
happiness
intelligence
learning
listening
math
mathematician
men
multiethnic
positive
presentation
professor
rear
russian
school
schoolboy
schoolgirl
senior
showing
student
studying
table
talking
teacher
teaching
teenagers
togetherness
training
university
young