School children in classroom at lesson. Teacher standing at chalkboard.

• answering, arm, asking, back, blackboard, boy, chalkboard, child, class, classmate, classroom, competition, concept, confidence, course, crowd, desk, diligence, education, exam, girl, graduation, group, hands, indoors, knowing, knowledge, learning, lesson, math, pupil, question, raise, rearview, school, sitting, solution, student, teacher, teamwork, together, training, tutorial, up, vote, voting, young, youth, armsraised
• ID: 1006960804
• Model: 13986827 13986842 13986833 13797473
• 5402 x 3601 pixels