Keywords
30-35 years, addition, button down shirt, casual clothes, classroom, color image, day, document, education, enthusiasm, enthusiastic, equation, expectations, felt tip pen, front view, indoors, looking, man, mathematics, mid-adult, mid-adult man, neutral background, northern european ethnicity, number, one mid-adult man only, one person, portrait, profession, questioning, school, sunlight, teacher, teaching, waist up, 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, faa047000004