Kopf, Glühbirne mit Kreidetafel Hintergrund
Palabras clave
blackboard,
chalk,
business,
board,
black,
concept,
signs,
training,
white,
text,
school,
symbol,
conceptual,
word,
success,
write,
handwriting,
bulb,
icon,
formula,
web,
team,
thumb,
head,
brain,
thought,
idea,
hopeful,
confident,
beneficial,
teamwork,
cooperation,
brainstorm,
objective,
cohesion,
led,
light,
idea
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