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blackboard
calculation
chalkboard
class
classroom
concept
development
disciplines
divider
draft
draw
easily
education
elementary
equipment
exam
formulas
geometry
glasses
good
handwritten
homework
items
knowledge
learn
lesson
man
math
mathematics
mature
perfect
physics
private teaching
protractor
ruler
school
science
senior
sign
square
stem
teacher
tool
triangle
tutor
use
writing
定額
try this. what angle you look. geometric shapes. high school modern education. senior man teacher use ruler while drawing. tutor man in glasses draw with ruler on blackboard. back to schoolの素材 [FY310158688733]
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