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    Empty seats in a school theatre auditorium, with the house lights on in a high school — Stock Photo
    Empty seats in a school theatre auditorium, with the house lights on in a high school
    Junior high students walking in library — Stock Photo
    Junior high students walking in library
    Teacher helping junior high school students at desk in classroom — Stock Photo
    Teacher helping junior high school students at desk in classroom
    Gonville And Caius College At Cambridge — Stock Photo
    Gonville And Caius College At Cambridge
    Low angle close up of a group of female Caucasian field hockey players and their Caucasian male coach, preparing before a game, huddling, hands stacking, on a sunny day — Stock Photo
    Low angle close up of a group of female Caucasian field hockey players and their Caucasian male coach, preparing before a game, huddling, hands stacking, on a sunny day
    Students writing their GCSE exam in classroom — Stock Photo
    Students writing their GCSE exam in classroom
    Front view close up of a Caucasian teenage boy musician with brown shirt sitting in front of a window playing a French horn alone at school — Stock Photo
    Front view close up of a Caucasian teenage boy musician with brown shirt sitting in front of a window playing a French horn alone at school
    Junior high school students doing homework at desks in classroom — Stock Photo
    Junior high school students doing homework at desks in classroom
    Female teacher and girl students using laptop in classroom — Stock Photo
    Female teacher and girl students using laptop in classroom
    Curious students conducting scientific experiment, examining liquid in beaker in laboratory classroom — Stock Photo
    Curious students conducting scientific experiment, examining liquid in beaker in laboratory classroom
    Portrait smiling, confident junior high school girl student with headphones at desk in classroom — Stock Photo
    Portrait smiling, confident junior high school girl student with headphones at desk in classroom
    Side view of a Caucasian male field hockey coach interacting with a group of female Caucasian field hockey players, sitting in a changing room, showing them a game plan — Stock Photo
    Side view of a Caucasian male field hockey coach interacting with a group of female Caucasian field hockey players, sitting in a changing room, showing them a game plan
    Portrait of a Caucasian teenage girl sitting at a desk in a school classroom using a laptop computer and looking to camera smiling, with classmates sitting at desks working in the background — Stock Photo
    Portrait of a Caucasian teenage girl sitting at a desk in a school classroom using a laptop computer and looking to camera smiling, with classmates sitting at desks working in the background
    Junior high girl students entering library — Stock Photo
    Junior high girl students entering library
    University students sitting at desk in classroom — Stock Photo
    University students sitting at desk in classroom
    Smiling male teacher leading lesson in classroom — Stock Photo
    Smiling male teacher leading lesson in classroom
    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
    Side view of a group of female Caucasian field hockey players, training before a game, working out on a field hockey pitch, doing exercises, stretching their legs, bending down to their feet 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, doing exercises, stretching their legs, bending down to their feet on a sunny day
    Female teacher helping junior high school students doing homework at desk in classroom — Stock Photo
    Female teacher helping junior high school students doing homework at desk in classroom
    Side view of a multi-ethnic group of teenage pupils sitting at desks in class studying at school with a Caucasian male teacher standing and talking to one Caucasian girl at her desk — Stock Photo
    Side view of a multi-ethnic group of teenage pupils sitting at desks in class studying at school with a Caucasian male teacher standing and talking to one Caucasian girl at her desk
    Schoolkids using laptop in classroom at school — Stock Photo
    Schoolkids using laptop in classroom at school
    Front view mid section of musician teenage boy with yellow t-shirt sitting and playing an acoustic guitar in a high school — Stock Photo
    Front view mid section of musician teenage boy with yellow t-shirt sitting and playing an acoustic guitar in a high school
    Boy student holding and examining molecular structure — Stock Photo
    Boy student holding and examining molecular structure
    Side view close up of a multi-ethnic group of teenage male and female choristers holding sheet music and laughing, standing on the stage of a school theatre during a break in rehearsals for a performance — Stock Photo
    Side view close up of a multi-ethnic group of teenage male and female choristers holding sheet music and laughing, standing on the stage of a school theatre during a break in rehearsals for a performance
    Teenage female university student practicing experiment in chemistry lab — Stock Photo
    Teenage female university student practicing experiment in chemistry lab
    Bridal high-heeled shoes with flowers — Stock Photo
    Bridal high-heeled shoes with flowers
    Rear view of a multi-ethnic group of teenage male and female school pupils with schoolbags hanging out, walking in their high school grounds — Stock Photo
    Rear view of a multi-ethnic group of teenage male and female school pupils with schoolbags hanging out, walking in their high school grounds
    Side view of two high school African American teenage female school pupils, using a smartphone and sitting on steps in the school grounds — Stock Photo
    Side view of two high school African American teenage female school pupils, using a smartphone and sitting on steps in the school grounds
    Portrait of confident teachers in library with students — Stock Photo
    Portrait of confident teachers in library with students
    Happy high school students and teacher clapping in debate class — Stock Photo
    Happy high school students and teacher clapping in debate class
    Low angle view of a group of female Caucasian field hockey players and their Caucasian male coach training before a game, running on a stand up and down, on a sunny day — Stock Photo
    Low angle view of a group of female Caucasian field hockey players and their Caucasian male coach training before a game, running on a stand up and down, on a sunny day
    Junior high students hanging out — Stock Photo
    Junior high students hanging out
    Students using computer in classroom — Stock Photo
    Students using computer in classroom
    Portrait of smiling, confident junior student carrying books in library — Stock Photo
    Portrait of smiling, confident junior student carrying books in library
    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
    Rear view of a Caucasian woman conductor directing 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
    Rear view of a Caucasian woman conductor directing 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
    Closeup on lettuce grown on an above-ground tray. — Stock Photo
    Closeup on lettuce grown on an above-ground tray.
    Smiling girl students researching at computer in laboratory classroom — Stock Photo
    Smiling girl students researching at computer in laboratory classroom
    High angle view of a multi-ethnic group of teenage school pupils sitting and standing around a table in a classroom looking at laptop and tablet computers together and talking at break time — Stock Photo
    High angle view of a multi-ethnic group of teenage school pupils sitting and standing around a table in a classroom looking at laptop and tablet computers together and talking at break time
    Rear view of a Caucasian woman sitting and conducting a multi-ethnic group of male and female teenage musicians playing at a school band practice — Stock Photo
    Rear view of a Caucasian woman sitting and conducting a multi-ethnic group of male and female teenage musicians playing at a school band practice
    Curious, focused boy examining computer chip in classroom — Stock Photo
    Curious, focused boy examining computer chip in classroom
    Digital illustration of solid node in right lung near lung apex while secondary tuberculosis infection. — Stock Photo
    Digital illustration of solid node in right lung near lung apex while secondary tuberculosis infection.
    Front 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
    Front 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
    Side view of a teenage Caucasian boy in a school classroom sitting at desk, concentrating, looking out of the window and leaning his head on his hand — Stock Photo
    Side view of a teenage Caucasian boy in a school classroom sitting at desk, concentrating, looking out of the window and leaning his head on his hand
    Human ovary structure — Stock Photo
    Human ovary structure
    Digital molecular model of secondary structure of immunoglobulin G antibody. — Stock Photo
    Digital molecular model of secondary structure of immunoglobulin G antibody.
    Portrait of confident teachers standing outside school building steps — Stock Photo
    Portrait of confident teachers standing outside school building steps
    Schoolboy explaining about world map in classroom at school — Stock Photo
    Schoolboy explaining about world map in classroom at school
    Teenage female student using machinery in laboratory at college — Stock Photo
    Teenage female student using machinery in laboratory at college
    Science teacher helping girl student at microscope in classroom laboratory — Stock Photo
    Science teacher helping girl student at microscope in classroom laboratory
    Side view of a teenage African American girl in a high school classroom sitting on a desk, concentrating and writing, with teenage male and female classmates sitting at desks working in the background — Stock Photo
    Side view of a teenage African American girl in a high school classroom sitting on a desk, concentrating and writing, with teenage male and female classmates sitting at desks working in the background
    France, Dordogne, plowed fields and forest. Pool of light — Stock Photo
    France, Dordogne, plowed fields and forest. Pool of light
    Secondary tuberculosis lungs infection and close-up of Mycobacterium tuberculosis bacteria. — Stock Photo
    Secondary tuberculosis lungs infection and close-up of Mycobacterium tuberculosis bacteria.
    Happy boys playing basketball in schoolyard — Stock Photo
    Happy boys playing basketball in schoolyard
    Side view of a group of female Caucasian field hockey players training before a game, working out on a field hockey pitch, doing exercises, running, holding hockey sticks 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, doing exercises, running, holding hockey sticks on a sunny day
    Junior high school students at desks in classroom — Stock Photo
    Junior high school students at desks in classroom
    Teacher leading lesson at touch screen in classroom — Stock Photo
    Teacher leading lesson at touch screen in classroom
    Rear view of a group of female Caucasian field hockey players, preparing before a game, standing in a row embracing, on a sunny day — Stock Photo
    Rear view of a group of female Caucasian field hockey players, preparing before a game, standing in a row embracing, on a sunny day
    Portrait smiling high school girl in stairway — Stock Photo
    Portrait smiling high school girl in stairway
    Portrait of college students with arms crossed standing in lab — Stock Photo
    Portrait of college students with arms crossed standing in lab