ครู, การ์ตูน, คณะกรรมการ, กระดานดำ, ชั้น, คน, การศึกษา, ชอล์ก, บทเรียน, ห้องเรียน, ชาย
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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