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Handgun resting on blackboard tray with erasor and piece of chalk
Keywords:
education
teaching
high school
concepts
no people
text
studying
state school
green color
mathematical symbol
indoors
number
teacher
back to school
blackboard
trigonometry
plus sign
school supplies
science
visual aid
algebra
student
formula
classroom
mathematics
school building
elementary school
learning
chalk
art equipment
state school
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