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question mark and light bulb
Question mark and light bulb on blackboard
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Oct.01, 2013 09:02:30
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WHITE BACKGROUND ON DESIGN COPY SPACE ISOLATED BRIGHT BUSINESS SIGN ART ABSTRACT ENERGY LIGHT BOARD BLACK CREATIVITY SYMBOL IMAGINATION INSPIRATION CREATIVE CONCEPT IDEA ICON MARK SCHOOL BULB DRAWING EDUCATION SOLUTION SKETCH THINKING CONCEPTUAL INNOVATION STRAIGHT TEACH QUESTION TEACHER BLACKBOARD EDUCATE CHALK AND SCHOOLING BRAINSTORMING CHALKBOARD LIGHT BULB