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    Front view of a group of confident female Caucasian field hockey players, preparing before a game, standing in a row, with arms crossed, looking at camera, on a sunny day — Stock Photo
    Front view of a group of confident female Caucasian field hockey players, preparing before a game, standing in a row, with arms crossed, looking at camera, on a sunny day
    College students looking at tablet computer while studying at desk in library — Stock Photo
    College students looking at tablet computer while studying at desk in library
    High school boys spray painting in art class — Stock Photo
    High school boys spray painting in art class
    Schoolkids walking in school campus on a sunny day — Stock Photo
    Schoolkids walking in school campus on a sunny day
    Low section front view close up of two teenage female high school pupils, using smartphones and sitting on steps in the school grounds — Stock Photo
    Low section front view close up of two teenage female high school pupils, using smartphones and sitting on steps in the school grounds
    Portrait of smiling, confident junior high school student doing homework in classroom — Stock Photo
    Portrait of smiling, confident junior high school student doing homework in classroom
    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 group of female Caucasian field hockey players, training before a game, working out on a field hockey pitch, doing push ups, with their coach in the foreground, on a sunny day — Stock Photo
    Front view of a group of female Caucasian field hockey players, training before a game, working out on a field hockey pitch, doing push ups, with their coach in the foreground, on a sunny day
    Boy student examining DNA model in laboratory classroom — Stock Photo
    Boy student examining DNA model in laboratory classroom
    Front view of a group of female Caucasian field hockey players training before a game, standing on a stand, 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 stand, resting, on a sunny day
    Front view of a group of female Caucasian field hockey players and their Caucasian male field hockey coach, training before a game, working out on a field hockey pitch, doing planks, on a sunny day — Stock Photo
    Front view of a group of female Caucasian field hockey players and their Caucasian male field hockey coach, training before a game, working out on a field hockey pitch, doing planks, on a sunny day
    Young students practicing chemistry experiment in lab — Stock Photo
    Young students practicing chemistry experiment in lab
    Female teacher and girl students examining molecular structure in classroom — Stock Photo
    Female teacher and girl students examining molecular structure in classroom
    Portrait enthusiastic junior high students and teachers cheering with arms raised — Stock Photo
    Portrait enthusiastic junior high students and teachers cheering with arms raised
    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 female teenage student reading book while sitting by shelf in library — Stock Photo
    Side view of female teenage student reading book while sitting by shelf in library
    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
    Side view close up of two Caucasian teenage girls with long dark hair sitting in front of a window playing a flute and a ukulele — Stock Photo
    Side view close up of two Caucasian teenage girls with long dark hair sitting in front of a window playing a flute and a ukulele
    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
    Portrait of a teenage Caucasian male field hockey player with red hair, wearing a red team strip, standing on a hockey pitch, with his teammates in the background on a sunny day — Stock Photo
    Portrait of a teenage Caucasian male field hockey player with red hair, wearing a red team strip, standing on a hockey pitch, with his teammates in the background on a sunny day
    High school students talking at table in debate class — Stock Photo
    High school students talking at table in debate class
    Group portrait of schoolchildren wearing school uniforms standing in corridor and smiling — Stock Photo
    Group portrait of schoolchildren wearing school uniforms standing in corridor and smiling
    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
    Portrait of a Caucasian musician teenage girl sitting by a window, looking to camera and holding a ukulele in a high school — Stock Photo
    Portrait of a Caucasian musician teenage girl sitting by a window, looking to camera and holding a ukulele in a high school
    Front view of a teenage mixed-race boy in a school classroom sitting at desk, concentrating and using laptop computer, with teenage male and female classmates sitting at desks working in the background — Stock Photo
    Front view of a teenage mixed-race boy in a school classroom sitting at desk, concentrating and using laptop computer, with teenage male and female classmates sitting at desks working in the background
    Male teacher teaching students in the classroom at school — Stock Photo
    Male teacher teaching students in the classroom at school
    Young woman in wheelchair getting out of elevator — Stock Photo
    Young woman in wheelchair getting out of elevator
    Digital molecular model of secondary structure of immunoglobulin G antibody. — Stock Photo
    Digital molecular model of secondary structure of immunoglobulin G antibody.
    Smiling teacher leading lesson at projection screen in classroom — Stock Photo
    Smiling teacher leading lesson at projection screen in classroom
    Side view of a multi-ethnic group of high school teenage male and female school pupils in a classroom, working on computers and concentrating — Stock Photo
    Side view of a multi-ethnic group of high school teenage male and female school pupils in a classroom, working on computers and concentrating
    College students sitting at table during exam in classroom — Stock Photo
    College students sitting at table during exam in classroom
    Students using laptop in the classroom at school — Stock Photo
    Students using laptop in the classroom at school
    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
    Distant side view of a Caucasian teenage male high school student in an empty high school theatre preparing before a performance, sitting on chair on the stage, holding a script and practicing his part — Stock Photo
    Distant side view of a Caucasian teenage male high school student in an empty high school theatre preparing before a performance, sitting on chair on the stage, holding a script and practicing his part
    Front view of a multi-ethnic group of teenage pupils standing together in a classroom and smiling to camera at break time — Stock Photo
    Front view of a multi-ethnic group of teenage pupils standing together in a classroom and smiling to camera at break time
    Female teacher and students watching scientific experiment chemical reaction in laboratory classroom — Stock Photo
    Female teacher and students watching scientific experiment chemical reaction in laboratory classroom
    High school boy student taking notes, writing in notebook in classroom — Stock Photo
    High school boy student taking notes, writing in notebook in classroom
    Side view of a mixed race teenage girl standing on stage holding a script in an empty school theatre during rehearsals for a performance — Stock Photo
    Side view of a mixed race teenage girl standing on stage holding a script in an empty school theatre during rehearsals for a performance
    High school students with hands raised during lesson in classroom — Stock Photo
    High school students with hands raised during lesson in classroom
    Side view of a group of female Caucasian field hockey players, training before a game, working out on a field hockey pitch, exercising, stretching, on a sunny day — Stock Photo
    Side view of a group of female Caucasian field hockey players, training before a game, working out on a field hockey pitch, exercising, stretching, on a sunny day
    Teenagers playing pool in community center — Stock Photo
    Teenagers playing pool in community center
    Portrait confident junior high school boy student doing homework in classroom — Stock Photo
    Portrait confident junior high school boy student doing homework in classroom
    Surprised students conducting exploding foam scientific experiment in classroom laboratory — Stock Photo
    Surprised students conducting exploding foam scientific experiment in classroom laboratory
    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
    Side view of multi-ethnic group of high school teenagers in a school classroom sitting at desks, all raising their hands to answer a question — Stock Photo
    Side view of multi-ethnic group of high school teenagers in a school classroom sitting at desks, all raising their hands to answer a question
    Male high school teacher leading lesson at projection screen in classroom — Stock Photo
    Male high school teacher leading lesson at projection screen in classroom
    Portrait smiling, confident junior high teachers in library — Stock Photo
    Portrait smiling, confident junior high teachers in library
    Students assembling robotics in classroom — Stock Photo
    Students assembling robotics in classroom
    High school students talking and studying at table in classroom — Stock Photo
    High school students talking and studying at table in classroom
    Side view of a Caucasian teenage male high school student in an empty high school theatre preparing before a performance, standing on the stage, holding a script and practicing his part — Stock Photo
    Side view of a Caucasian teenage male high school student in an empty high school theatre preparing before a performance, standing on the stage, holding a script and practicing his part
    Teenage female student using machinery in laboratory at college — Stock Photo
    Teenage female student using machinery in laboratory at college
    Side view of a Caucasian male high school teacher, standing and talking with a multi-ethnic group of female high school students in a school classroom sitting at a desk — Stock Photo
    Side view of a Caucasian male high school teacher, standing and talking with a multi-ethnic group of female high school students in a school classroom sitting at a desk
    Students writing their GCSE exam in classroom — Stock Photo
    Students writing their GCSE exam in classroom
    Digital molecular model of secondary structure of immunoglobulin G antibody. — Stock Photo
    Digital molecular model of secondary structure of immunoglobulin G antibody.
    Four hanging in the air colorful balloons with smiley on red against grey wall — Stock Photo
    Four hanging in the air colorful balloons with smiley on red against grey wall
    Rear view of a Caucasian male field hockey goalkeeper, diving to stop the ball with a hockey stick while training on the hockey pitch, with his teammates in the background on a sunny day — Stock Photo
    Rear view of a Caucasian male field hockey goalkeeper, diving to stop the ball with a hockey stick while training on the hockey pitch, with his teammates in the background on a sunny day
    Male teacher using digital tablet with students in classroom at school — Stock Photo
    Male teacher using digital tablet with students in classroom at school
    Male teacher helping girl student at microscope in laboratory classroom — Stock Photo
    Male teacher helping girl student at microscope in laboratory classroom
    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
    Girl student examining and touching molecular structure in classroom — Stock Photo
    Girl student examining and touching molecular structure in classroom