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    Side view of a Caucasian male high school teacher, standing and talking with a teenage Caucasian girl in a school classroom sitting a desk, with teenage classmates sitting at desks working in the background — Stock Photo
    Side view of a Caucasian male high school teacher, standing and talking with a teenage Caucasian girl in a school classroom sitting a desk, with teenage classmates sitting at desks working in the background
    Portrait teenage girl wearing hijab — Stock Photo
    Portrait teenage girl wearing hijab
    Aerial view of Wuming Buddhist College at night of Seda County, Sichuan province, China — Stock Photo
    Aerial view of Wuming Buddhist College at night of Seda County, Sichuan province, China
    Junior high girl students walking in library — Stock Photo
    Junior high girl students walking in library
    Front view of a teenage mixed-race boy in a school classroom sitting at desk, concentrating and reading, with teenage male and female classmates sitting at desks working around him — Stock Photo
    Front view of a teenage mixed-race boy in a school classroom sitting at desk, concentrating and reading, with teenage male and female classmates sitting at desks working around him
    Teenage girl operating video camera, vlogging — Stock Photo
    Teenage girl operating video camera, vlogging
    Front view mid section of male high school student wearing a gown, with arms crossed, holding a diploma on his graduation day, with arms crossed — Stock Photo
    Front view mid section of male high school student wearing a gown, with arms crossed, holding a diploma on his graduation day, with arms crossed
    Female geography teacher with globe teaching lesson in classroom — Stock Photo
    Female geography teacher with globe teaching lesson in classroom
    Portrait confident young woman in hijab — Stock Photo
    Portrait confident young woman in hijab
    Portrait of confident junior high students — Stock Photo
    Portrait of confident junior high students
    Students conducting scientific experiment, pouring liquid in beaker in laboratory classroom — Stock Photo
    Students conducting scientific experiment, pouring liquid in beaker in laboratory classroom
    Portrait confident young female college student in library — Stock Photo
    Portrait confident young female college student in library
    Side view of Caucasian teenage boy and girl holding scripts and performing on the stage of a school theatre during rehearsals for a performance — Stock Photo
    Side view of Caucasian teenage boy and girl holding scripts and performing on the stage of a school theatre during rehearsals for a performance
    Portrait confident college students — Stock Photo
    Portrait confident college students
    Portrait of smiling, confident junior high student using computer in computer lab — Stock Photo
    Portrait of smiling, confident junior high student using computer in computer lab
    Portrait of a teenage mixed race male field hockey player, wearing a red team strip, standing in a changing room looking straight to camera, focusing before a game — Stock Photo
    Portrait of a teenage mixed race male field hockey player, wearing a red team strip, standing in a changing room looking straight to camera, focusing before a game
    Portrait confident young female college student in computer lab — Stock Photo
    Portrait confident young female college student in computer lab
    Young woman writing in book — Stock Photo
    Young woman writing in book
    Side view of a teenage Caucasian girl in a school classroom sitting at desk, concentrating and writing, with teenage male and female classmates sitting at desks working in the background — Stock Photo
    Side view of a teenage Caucasian girl in a school classroom sitting at desk, concentrating and writing, with teenage male and female classmates sitting at desks working in the background
    Teenage friends using smart phone outside sunny school building — Stock Photo
    Teenage friends using smart phone outside sunny school building
    Happy college students talking in corridor — Stock Photo
    Happy college students talking in corridor
    France, 15th arrondissement of Paris, view from the Eiffel Tower toward the south periphery (eglise Saint Leon and green-roof Jeanne Manuel-Dupleix school) — Stock Photo
    France, 15th arrondissement of Paris, view from the Eiffel Tower toward the south periphery (eglise Saint Leon and green-roof Jeanne Manuel-Dupleix school)
    Rear view of multi-ethnic group of high school teenagers in a school classroom sitting at desks, all raising their hands to answer a question, their male teacher standing in the background — Stock Photo
    Rear view of multi-ethnic group of high school teenagers in a school classroom sitting at desks, all raising their hands to answer a question, their male teacher standing in the background
    High angle view of rural female teacher and chinese pupils smiling at camera in the classroom — Stock Photo
    High angle view of rural female teacher and chinese pupils smiling at camera in the classroom
    Side view of two teenage Caucasian girls talking in a school classroom, one turning around in her seat to talk to the other, sitting at a desk behind her, concentrating and writing — Stock Photo
    Side view of two teenage Caucasian girls talking in a school classroom, one turning around in her seat to talk to the other, sitting at a desk behind her, concentrating and writing
    Curious girl student examining molecular structure in classroom — Stock Photo
    Curious girl student examining molecular structure in classroom
    Junior high students using computer in computer lab — Stock Photo
    Junior high students using computer in computer lab
    Rear view of a Caucasian female field hockey player, during a field hockey game, running with a ball, holding a hockey stick, with her teammates and opponents in the foreground, on a sunny day — Stock Photo
    Rear view of a Caucasian female field hockey player, during a field hockey game, running with a ball, holding a hockey stick, with her teammates and opponents in the foreground, on a sunny day
    Side view close up of a Caucasian teenage boy sitting alone in a schoolyard wearing headphones and looking at a smartphone — Stock Photo
    Side view close up of a Caucasian teenage boy sitting alone in a schoolyard wearing headphones and looking at a smartphone
    Focused young male basketball player shooting free throw — Stock Photo
    Focused young male basketball player shooting free throw
    Focused high school girl student taking exam at desk in classroom — Stock Photo
    Focused high school girl student taking exam at desk in classroom
    Happy college students talking and studying in library — Stock Photo
    Happy college students talking and studying in library
    Portrait close up of a Caucasian male field hockey player, wearing a white team strip, standing on a hockey pitch looking to camera on a sunny day — Stock Photo
    Portrait close up of a Caucasian male field hockey player, wearing a white team strip, standing on a hockey pitch looking to camera on a sunny day
    Happy, smiling high school girl student talking with classmate in classroom — Stock Photo
    Happy, smiling high school girl student talking with classmate in classroom
    Model of human head — Stock Photo
    Model of human head
    Focused teenage boy with clipboard vlogging — Stock Photo
    Focused teenage boy with clipboard vlogging
    Girl student using microscope, conducting scientific experiment in laboratory classroom — Stock Photo
    Girl student using microscope, conducting scientific experiment in laboratory classroom
    Teacher explaining students in classroom — Stock Photo
    Teacher explaining students in classroom
    Female art students working in art studio — Stock Photo
    Female art students working in art studio
    Front view close up of a multi-ethnic group of teenage male and female choristers holding sheet music and singing standing on the stage of a school theatre during rehearsals for a performance — Stock Photo
    Front view close up of a multi-ethnic group of teenage male and female choristers holding sheet music and singing standing on the stage of a school theatre during rehearsals for a performance
    Students going out of classroom after lesson — Stock Photo
    Students going out of classroom after lesson
    Curious, smiling students watching chemical reaction, conducting scientific experiment in laboratory classroom — Stock Photo
    Curious, smiling students watching chemical reaction, conducting scientific experiment in laboratory classroom
    Students typing at computers in adult education classroom — Stock Photo
    Students typing at computers in adult education classroom
    Boy playing guitar — Stock Photo
    Boy playing guitar
    Low angle side view of a group of female Caucasian field hockey players, before a game, standing in a row, greeting the opponents, on a sunny day — Stock Photo
    Low angle side view of a group of female Caucasian field hockey players, before a game, standing in a row, greeting the opponents, on a sunny day
    High angle view of rural female teacher and chinese pupils raising hands and smiling at camera in classroom — Stock Photo
    High angle view of rural female teacher and chinese pupils raising hands and smiling at camera in classroom
    Front view of a teenage Caucasian boy sitting a desk looking ahead and concentrating in a school classroom, with a row of teenage female classmates sitting at desks behind him — Stock Photo
    Front view of a teenage Caucasian boy sitting a desk looking ahead and concentrating in a school classroom, with a row of teenage female classmates sitting at desks behind him
    Curious students examining DNA model in classroom — Stock Photo
    Curious students examining DNA model in classroom
    High school students clapping for teacher in debate class — Stock Photo
    High school students clapping for teacher in debate class
    Boy student examining DNA model in classroom — Stock Photo
    Boy student examining DNA model in classroom
    Enthusiastic college students high-fiving in stairway — Stock Photo
    Enthusiastic college students high-fiving in stairway
    Instructor guiding students in dance class studio — Stock Photo
    Instructor guiding students in dance class studio
    Teenage girls studying, talking on bed — Stock Photo
    Teenage girls studying, talking on bed
    Front view of a multi-ethnic group of male and female teenager students sitting on a wall talking and using tablet computers in their school grounds — Stock Photo
    Front view of a multi-ethnic group of male and female teenager students sitting on a wall talking and using tablet computers in their school grounds
    Junior high school boy student doing homework in classroom — Stock Photo
    Junior high school boy student doing homework in classroom
    Skeleton model in high school hallway, Winston-Salem, North Carolina, USA — Stock Photo
    Skeleton model in high school hallway, Winston-Salem, North Carolina, USA
    Happy junior high schoolboy — Stock Photo
    Happy junior high schoolboy
    Front view of a male Caucasian teacher standing, holding a tablet computer and talking to a multi-ethnic group of teenagers in a school high school classroom sitting at desks and listening — Stock Photo
    Front view of a male Caucasian teacher standing, holding a tablet computer and talking to a multi-ethnic group of teenagers in a school high school classroom sitting at desks and listening
    High school students talking in debate class at table in classroom — Stock Photo
    High school students talking in debate class at table in classroom
    Close up profile girl student using microscope, conducting scientific experiment — Stock Photo
    Close up profile girl student using microscope, conducting scientific experiment