african american
app
application
asian
background
black
caucasian
cellphone
children
class
classmates
classroom
concept
desk
digital
diverse
education
elementary
gadget
grade
group
indoors
international
kids
knowledge
learning
lesson
lifestyle
mixed
mobile
modern
multicultural
multiethnic
multiracial
online
people
phone
preadolescent
preteen
pupils
school
schoolboy
schoolgirls
selective focus
sitting
smartphone
students
study
technology