classroom with green chalkboard
Schlüsselwörter
class,
room,
classroom,
study,
school,
vector,
chalk,
blackboard,
board,
learn,
gear,
cog,
cogwheel,
summing,
addition,
green,
educate,
education,
educational,
elementary,
studying,
learning,
table,
lecture,
lecturing,
lesson,
flat
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