african

afro

age

american

black

board

caucasian

chart

college

concept

diagram

discussing

drawing

economics

education

hall

high

hispanic

indoors

international

latin

learn

learning

lecture

lecturer

man

meeting

middle

multiethnic

multiracial

people

person

plan

presentation

scheme

school

showing

sketch

statistics

strategy

student

study

studying

talking

teacher

tutor

university

white

whiteboard

young