Keywords
30-35 years, addition, button down shirt, casual clothes, classroom, color image, day, education, equation, felt tip pen, focus on foreground, head and shoulders, indoors, looking away, man, mathematics, mid-adult, mid-adult man, neutral background, northern european ethnicity, number, one mid-adult man only, one person, pointing, portrait, profession, questioning, school, teacher, teaching, three-quarter front view, whiteboard, 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, faa047000003