blackboard
bottle
boy
casual wear
caucasian
child
children
class
classroom
collaborating
education
epidemic
face mask
female
girl
glasses
hand sanitizer
kid
male
mask
new normal
notebook
pandemic
participating
pen
pencil case
people
person
preteen
prevention
protection
protective mask
raising hand
reusable cloth mask
safety
school
schoolmates
sitting
smart
student
table
teen
teenager
two
vertical
virus
young