1516 years
1718 years
american
assistance
boy
brainstorm
caucasian
class
classmate
classroom
clever
cognition
community
company
concentration
education
european
exam
explaining
female
french
german
girl
group
guy
high school
indoor
kids
learning
lesson
male
mate
russian
school
schoolgirl
sitting
skill
smart
solution
solving
studying
teenager
test
young
youth