Keywords
20's, 20-24 years, 20-25, 20-30, 20s, 25-30, 3, 30's, 30-34 years, 30-35, 30-40, 30s, 35-40, adjusting, adult, arms outstretched, beaker, blackboard, buret, caucasian, chalk, chalkboard, chatting, chemical, chemistry, class, classmate, classroom, clip board, clip-board, clipboard, college, color, color image, colour, communicating, communication, concentrating, concentration, confidence, confident, conversation, conversing, copy space, data, dialog, dialogue, discussing, educating, education, educator, equation, examining, experiment, experimentation, experimenting, fellow, flask, formula, front view, gentleman, guy, holding, horizontal, human, human being, idealism, implement, indoor, indoors, information, inside, instructing, instruction, instructor, intelligence, knowledge, lab, lab coat, laboratory, learning, lecture, lecturer, lecturing, liquid, male, man, mathematics, mid adult, mid adult men, negative space, note taking, opportunity, optimism, optimist, pen, people, person, photography, possibility, potential, professor, pupil, r&d, research, research & development, research and development, researching, school, schoolmate, schoolroom, science, speaking, speech, standing, student, studying, talker, talking, teacher, teaching, thirties, thirty, three, three people, three quarter length, three-quarter length, titration, training, tuition, tutor, tutoring, twenties, twenty, university, volumetric flask, waist up, waist-up, western european, wet, white coat, white space, wisdom, writing instrument, young adult, young men, stock image, images, royalty free photo, stock photos, stock photograph, stock photographs, picture, pictures, graphic, graphics, fine art prints, print, poster, posters, mural, wall murals, blm016458