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    Front view of a teenage African American girl in a school classroom sitting at desk, concentrating and reading, with teenage male classmates sitting at desks working in the background — Stock Photo
    Front view of a teenage African American girl in a school classroom sitting at desk, concentrating and reading, with teenage male classmates sitting at desks working in the background
    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
    Portrait of confident, smiling junior high student — Stock Photo
    Portrait of confident, smiling junior high student
    LAOS, 4000 ISLANDS AREA: Group of children in uniform walking together from school. — Stock Photo
    LAOS, 4000 ISLANDS AREA: Group of children in uniform walking together from school.
    Courtyard Of Coimbra University — Stock Photo
    Courtyard Of Coimbra University
    Students talking at table in library — Stock Photo
    Students talking at table in library
    Students watching chemical reaction, conducting scientific experiment in laboratory classroom — Stock Photo
    Students watching chemical reaction, conducting scientific experiment in laboratory classroom
    Coloured X-ray of the chest of a 52 year old female patient with metastatic (secondary) lung cancer (yellow). — Stock Photo
    Coloured X-ray of the chest of a 52 year old female patient with metastatic (secondary) lung cancer (yellow).
    Front view of a Caucasian teenage boy standing on stage holding a script in an empty school theatre during rehearsals for a performance — Stock Photo
    Front view of a Caucasian teenage boy standing on stage holding a script in an empty school theatre during rehearsals for a performance
    Side view of a multi-ethnic group of high school teenage male and female school pupils in a classroom, sitting at a table working together — Stock Photo
    Side view of a multi-ethnic group of high school teenage male and female school pupils in a classroom, sitting at a table working together
    Rear view of a teenage Caucasian male field hockey goalkeeper in action on the pitch, diving to stop a ball with a hockey stick, during a hockey match between two multi-ethnic teenage male teams on a sunny day, seen through the goal net — Stock Photo
    Rear view of a teenage Caucasian male field hockey goalkeeper in action on the pitch, diving to stop a ball with a hockey stick, during a hockey match between two multi-ethnic teenage male teams on a sunny day, seen through the goal net
    Over the shoulder view of a Caucasian female conductor and a multi-ethnic group of teenage male and female choristers standing opposite each other, the choir holding sheet music and singing — Stock Photo
    Over the shoulder view of a Caucasian female conductor and a multi-ethnic group of teenage male and female choristers standing opposite each other, the choir holding sheet music and singing
    High school students talking at table in debate class — Stock Photo
    High school students talking at table in debate class
    High school students doing homework and talking at tables in classroom — Stock Photo
    High school students doing homework and talking at tables in classroom
    Front view of a multi-ethnic team of teenage male field hockey players preparing before a game, standing on the pitch in a row, wearing their team strip, with their hands behind their backs, looking to camera on a sunny day — Stock Photo
    Front view of a multi-ethnic team of teenage male field hockey players preparing before a game, standing on the pitch in a row, wearing their team strip, with their hands behind their backs, looking to camera on a sunny day
    Portrait of smiling, confident junior high school students studying in classroom — Stock Photo
    Portrait of smiling, confident junior high school students studying in classroom
    Junior high school students participating with hands raised in classroom — Stock Photo
    Junior high school students participating with hands raised in classroom
    Side view of a teenage Caucasian boy holding sitting in front of a window in a classroom holding a French horn with a multi-ethnic group of teenage male and female musicians sitting behind him — Stock Photo
    Side view of a teenage Caucasian boy holding sitting in front of a window in a classroom holding a French horn with a multi-ethnic group of teenage male and female musicians sitting behind him
    High angle view of a multi-ethnic group of teenage concentrating pupils sitting at desks in class studying at school in a high school — Stock Photo
    High angle view of a multi-ethnic group of teenage concentrating pupils sitting at desks in class studying at school in a high school
    Boy students examining liquid in test tube, conducting scientific experiment in laboratory classroom — Stock Photo
    Boy students examining liquid in test tube, conducting scientific experiment in laboratory classroom
    Front view of two Caucasian teenage girls with long dark hair sitting in front of a window playing a flute and a ukulele — Stock Photo
    Front view of two Caucasian teenage girls with long dark hair sitting in front of a window playing a flute and a ukulele
    Junior high school students with hands raised during lesson in classroom — Stock Photo
    Junior high school students with hands raised during lesson in classroom
    Teenage boys spray painting in high school art class — Stock Photo
    Teenage boys spray painting in high school art class
    Rear view of a multi-ethnic group of male and female teenage students talking as they walk through their school grounds — Stock Photo
    Rear view of a multi-ethnic group of male and female teenage students talking as they walk through their school grounds
    Science teacher helping girl student at microscope in classroom laboratory — Stock Photo
    Science teacher helping girl student at microscope in classroom laboratory
    High school students talking during debate class in classroom — Stock Photo
    High school students talking during debate class in classroom
    Smiling high school students listening in debate class — Stock Photo
    Smiling high school students listening in debate class
    Front view of a Caucasian teenage girl sitting in a classroom playing a violin at a school band practice, with other teenage musicians sitting in the foreground — Stock Photo
    Front view of a Caucasian teenage girl sitting in a classroom playing a violin at a school band practice, with other teenage musicians sitting in the foreground
    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
    Liquid in bottles, test tubes and beakers in science laboratory classroom — Stock Photo
    Liquid in bottles, test tubes and beakers in science laboratory classroom
    Front view of a multi-ethnic team of teenage male field hockey players preparing before a game, standing on the pitch in a row, wearing their team strip, holding their hockey sticks, looking to camera on a sunny day — Stock Photo
    Front view of a multi-ethnic team of teenage male field hockey players preparing before a game, standing on the pitch in a row, wearing their team strip, holding their hockey sticks, looking to camera on a sunny day
    Front view of a multi-ethnic group of teenage pupils concentrating sitting at desks in class studying at school in a high school — Stock Photo
    Front view of a multi-ethnic group of teenage pupils concentrating sitting at desks in class studying at school in a high school
    Side view of multi-ethnic group of teenage boys and girls holding scripts and performing on the stage of a school theatre during rehearsals for a performance — Stock Photo
    Side view of multi-ethnic group of teenage boys and girls holding scripts and performing on the stage of a school theatre during rehearsals for a performance
    Junior high school boy students using digital tablets at desk in classroom — Stock Photo
    Junior high school boy students using digital tablets at desk in classroom
    Side view of two Caucasian teenage girls with long dark hair sitting in front of a window holding a flute and a ukulele looking at each other and smiling — Stock Photo
    Side view of two Caucasian teenage girls with long dark hair sitting in front of a window holding a flute and a ukulele looking at each other and smiling
    Teacher and students during chemistry lesson, wearing protective eyewear and looking at test tubes — Stock Photo
    Teacher and students during chemistry lesson, wearing protective eyewear and looking at test tubes
    Portrait of a confident Caucasian female field hockey player, preparing before a game, looking at camera with her teammates standing in a row in the background on a sunny day — Stock Photo
    Portrait of a confident Caucasian female field hockey player, preparing before a game, looking at camera with her teammates standing in a row in the background on a sunny day
    Side view of male college student practicing chemistry experiment in lab — Stock Photo
    Side view of male college student practicing chemistry experiment in 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
    Front view of a multi-ethnic group of teenage male and female school pupils with schoolbags hanging out, walking and talking in their high school grounds — Stock Photo
    Front view of a multi-ethnic group of teenage male and female school pupils with schoolbags hanging out, walking and talking in their high school grounds
    Smiling female chemistry teacher and students conducting scientific experiment in laboratory classroom — Stock Photo
    Smiling female chemistry teacher and students conducting scientific experiment in laboratory classroom
    Front view of a group of female Caucasian field hockey players training before a game, standing on a hockey pitch, resting, on a sunny day — Stock Photo
    Front view of a group of female Caucasian field hockey players training before a game, standing on a hockey pitch, resting, on a sunny day
    Junior high students using computer in library — Stock Photo
    Junior high students using computer in library
    Side view of a multi-ethnic group of teenage male field hokey players, training with their coach before a game, working out on a field hockey pitch on a sunny day, running on the spot — Stock Photo
    Side view of a multi-ethnic group of teenage male field hokey players, training with their coach before a game, working out on a field hockey pitch on a sunny day, running on the spot
    Confident junior high school girl student doing homework in classroom — Stock Photo
    Confident junior high school girl student doing homework in classroom
    College students writing on book while sitting at desks during exam in classroom — Stock Photo
    College students writing on book while sitting at desks during exam in classroom
    Portrait confident junior high school boy student doing homework in classroom — Stock Photo
    Portrait confident junior high school boy student doing homework in classroom
    Portrait of confident junior high school student doing homework in classroom — Stock Photo
    Portrait of confident junior high school student doing homework in classroom
    Tween boys playing basketball in schoolyard — Stock Photo
    Tween boys playing basketball in schoolyard
    Junior high school students listening in classroom — Stock Photo
    Junior high school students listening in classroom
    Smiling students using digital tablet in classroom — Stock Photo
    Smiling students using digital tablet in classroom
    Front view of a Caucasian teenage male high school pupil, using a smartphone and sitting on steps in the school grounds — Stock Photo
    Front view of a Caucasian teenage male high school pupil, using a smartphone and sitting on steps in the school grounds
    Female teacher and students conducting scientific experiment in laboratory classroom — Stock Photo
    Female teacher and students conducting scientific experiment in laboratory classroom
    Portrait confident, smiling female teacher and girl students researching at computer in library — Stock Photo
    Portrait confident, smiling female teacher and girl students researching at computer in library
    High school students clapping for classmate in debate class — Stock Photo
    High school students clapping for classmate in debate class
    Rear view of a Caucasian male field hockey coach interacting with a multi-ethnic group of teenage male field hockey players, sitting in the changing room, discussing the game — Stock Photo
    Rear view of a Caucasian male field hockey coach interacting with a multi-ethnic group of teenage male field hockey players, sitting in the changing room, discussing the game
    Curious junior high school boys using virtual reality simulators in classroom — Stock Photo
    Curious junior high school boys using virtual reality simulators in classroom
    Front view of a multi-ethnic group of teenage male field hockey players, training before a game, working out on a field hockey pitch, running on a sunny day — Stock Photo
    Front view of a multi-ethnic group of teenage male field hockey players, training before a game, working out on a field hockey pitch, running on a sunny day
    Schoolkids using digital tablet in classroom at school — Stock Photo
    Schoolkids using digital tablet in classroom at school
    High school teacher helping students studying in classroom — Stock Photo
    High school teacher helping students studying in classroom