13 years old
15 years old
16 years old
17 years old
20s
african american
algebra
asian
black
boy
caucasian
class
classroom
college
desk
education
explaining
female
girl
group
helping
high school
hispanic
horizontal
learning
lesson
male
man
math
maths
men
multicultural
multiethnic
people
person
pupil
school
sitting
student
studying
table
teacher
teaching
teen
teenage
teenager
tutor
twenties
usa