การเรียนรู้, การศึกษา, โรงเรียน, เด็ก, หนังสือ, ศึกษา, เรียน, นักเรียน, ความรู้, การอ่าน, เด็ก ๆ
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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