Knowledge concept. Stacked open books over blur empty black chalkboard. Copy space.
Palabras clave
cognition,
book,
blur,
empty,
blackboard,
stacked,
open,
black,
copy space,
teacher,
workplace,
desk,
stationery,
classroom,
essential,
school,
abstract,
background,
education,
art,
back to school,
primary,
high,
college,
university,
class,
lesson,
study,
learn,
subject,
discipline,
teaching,
student,
life events,
science,
blackboard,
supply,
creative,
board,
notepad,
blank,
nobody,
object,
empty space,
copy space
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