Ключевые слова: adult, advice, background, board, brainstorming, business, communication, concept, conference, consideration, counting, creative, creativity, deduction, diagram, differentiation, draw, drawing, education, equation, estimation, executive, felt, gesture, goal, highlighter, idea, lecture, logic, male, man, marker, meeting, note, office, pen, plan, presentation, showing, sketch, studio, teaching, whiteboard, writing, young,