adult
africanamerican
boy
caucasian
chemical
chemistry
child
children
class
classroom
clever
cute
development
education
elementary
equipment
exercise
experiment
female
girl
glassware
having
homework
kid
knowledge
laboratory
learn
learning
lesson
little
people
person
project
pupil
reaction
research
school
science
scientific
sitting
smart
student
study
studying
table
task
teacher
test
volcano
woman