Keywords
30-39 years, 30s, 35-39 years, 35-40 years, adult, adults, angle, angle view, angle views, arithmetic, arithmetic lesson, arithmetic lessons, back to camera, behind, below, black board, black boards, blackboard, blackboards, caucasian, caucasian ancestry, caucasian ethnicity, caucasians, chalk board, chalk boards, chalkboard, chalkboards, cheerfulness, class room, class rooms, classroom, classrooms, course, courses, curriculum, curriculums, desk, desks, directly below, eduation, education, educator, educators, equation, equations, faculty, female, females, formula, formulas, half length, happiness, happy, indoor, indoors, instructor, instructors, joy, learn, learning, lesson, lessons, low angle, low angle view, low angle views, math, math class, math classes, math formula, math formulas, math instruction, math lesson, math lessons, mathematical formula, mathematical formulas, mathematics, mentor, mentors, mid adult, mid adults, mid-adult, mid-adult woman, mid-adults, one person, people, point, pointing, rear view, scholastic, school, school desk, school desks, school work, schooling, schools, schoolwork, sitting, smile, smiles, smiling, student, students, studies, teacher, teachers, teaching, teaching staff, thirties, tilt, tilt view, tilt views, tilted, vertical, woman, women, work, working, 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, u17550747