15s
40s
activity
attendance
boy
caucasian
class
classmate
classroom
college
communicating
confident
diligent
education
emotions
engagement
european
exam
exercise
explaining
fellow
girl
group
interaction
interior
knowledge
lecturing
lesson
lifestyles
male
man
pedagogue
people
portrait
positive
professional
school
schoolboy
schoolgirl
schoolteacher
smiling
student
study
talking
teacher
teen
teenager
together
training
working