digital tablet
デジタルタブレット
adult
blank screen
blur
brunette
caucasian
chalkboard
cheerful
classroom
copy space
course
device
distance
education
elearning
emotion
eyeglasses
gadget
happy
indoors
internet
job
knowledge
lecture
lesson
looking at camera
math
mathematics
notebook
one person
online
positive
professional
remote
school
service
signs
smiling
symbols
teacher
technology
tutor
woman
work
workplace