adolescence
40s
adult
african american ethnicity
asian chinese ethnicity
attention
black
books
boy
caucasian
classroom
communication
conversation
desk
diversity
education
explaining
four people
girls
guidance
high school
horizontal
incidental people
indoors
interest
kids
knowledge
learning
lesson
listening
mentoring
middle aged
mixed race person
multiethnic group
pupils
school
schoolboys
schoolchildren
schoolgirls
selective focus
sitting
students
studying
talking
teacher
teaching
teenagers
waist up
woman