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    Side view of a Caucasian and a mixed race teenage girls holding scripts and laughing, sitting on the stage of a school theatre during rehearsals for a performance — Stock Photo
    Side view of a Caucasian and a mixed race teenage girls holding scripts and laughing, sitting on the stage of a school theatre during rehearsals for a performance
    Junior high school students watching teacher give lesson at projection screen in classroom — Stock Photo
    Junior high school students watching teacher give lesson at projection screen in classroom
    Focused girl students soldering circuit boards in classroom — Stock Photo
    Focused girl students soldering circuit boards 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
    Young college students discussing while standing in library — Stock Photo
    Young college students discussing while standing in library
    Secondary brain cancer — Stock Photo
    Secondary brain cancer
    Students writing their GCSE exam in classroom — Stock Photo
    Students writing their GCSE exam 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
    Rear view of a group of female Caucasian field hockey players, preparing before a game, standing in a row embracing with hands on their teammates shoulders, 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 with hands on their teammates shoulders, on a sunny day
    Side view of two teenage Caucasian male field hockey players from opposing teams in action on the pitch during a hockey game on a sunny day — Stock Photo
    Side view of two teenage Caucasian male field hockey players from opposing teams in action on the pitch during a hockey game on a sunny day
    Portrait close up of a Caucasian teenage boy with dark hair and grey eyes sitting at a desk in a school classroom looking straight to camera — Stock Photo
    Portrait close up of a Caucasian teenage boy with dark hair and grey eyes sitting at a desk in a school classroom looking straight to camera
    Girl student programming and assembling robotics in classroom — Stock Photo
    Girl student programming and assembling robotics in classroom
    Students examining liquid in test tube, conducting scientific experiment in laboratory classroom — Stock Photo
    Students examining liquid in test tube, conducting scientific experiment in laboratory classroom
    Portrait of confident junior high student — Stock Photo
    Portrait of confident junior high student
    Schoolgirl explaining about world map in classroom at school — Stock Photo
    Schoolgirl explaining about world map in classroom at school
    High school students studying at tables in classroom — Stock Photo
    High school students studying at tables in classroom
    Side view of a mixed race teenage boy and African American teenage girl high school student sitting on chairs in an empty school theatre preparing before a performance, holding scripts and rehearsing together — Stock Photo
    Side view of a mixed race teenage boy and African American teenage girl high school student sitting on chairs in an empty school theatre preparing before a performance, holding scripts and rehearsing together
    View of boy programming at computer in classroom on digital camera viewfinder — Stock Photo
    View of boy programming at computer in classroom on digital camera viewfinder
    Male teacher helping students assembling robotics in classroom — Stock Photo
    Male teacher helping students assembling robotics in classroom
    Front view close up of a teenage mixed-race boy in a school classroom sitting at desk, concentrating and using tablet computer, with teenage male and female classmates sitting at desks working in the background — Stock Photo
    Front view close up of a teenage mixed-race boy in a school classroom sitting at desk, concentrating and using tablet computer, with teenage male and female classmates sitting at desks working in the background
    Side view of a multi-ethnic group of male field hokey players and a Caucasian male field hokey coach, preparing before a game, huddling, interacting on a sunny day — Stock Photo
    Side view of a multi-ethnic group of male field hokey players and a Caucasian male field hokey coach, preparing before a game, huddling, interacting on a sunny day
    Portrait of a Caucasian teenage girl sitting at a desk in a school classroom writing in a notebook 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 writing in a notebook and looking to camera smiling, with classmates sitting at desks working in the background
    Side view a Caucasian male high school teacher, standing at the front of a class, talking to a multi-ethnic group of teenagers in a school classroom sitting at desks in rows, listening — Stock Photo
    Side view a Caucasian male high school teacher, standing at the front of a class, talking to a multi-ethnic group of teenagers in a school classroom sitting at desks in rows, listening
    Students assembling robotics in classroom — Stock Photo
    Students assembling robotics in classroom
    Digital molecular model of secondary structure of immunoglobulin G antibody. — Stock Photo
    Digital molecular model of secondary structure of immunoglobulin G antibody.
    Teenage girl operating video camera, vlogging — Stock Photo
    Teenage girl operating video camera, vlogging
    Female high school teacher helping girl student with homework in classroom — Stock Photo
    Female high school teacher helping girl student with homework in classroom
    Teenage girls designing denim jacket in fashion design class — Stock Photo
    Teenage girls designing denim jacket in fashion design class
    Teenage female practicing chemistry experiment in lab — Stock Photo
    Teenage female practicing chemistry experiment in lab
    Portrait smiling high school students on stair landing — Stock Photo
    Portrait smiling high school students on stair landing
    Teacher helping junior high school students at desk in classroom — Stock Photo
    Teacher helping junior high school students at desk in classroom
    Front view of a mixed race and a Caucasian teenage male field hockey player preparing before a game, in a huddle with multi-ethnic group of male players in their team, interacting on a sunny day on the pitch before a game — Stock Photo
    Front view of a mixed race and a Caucasian teenage male field hockey player preparing before a game, in a huddle with multi-ethnic group of male players in their team, interacting on a sunny day on the pitch before a game
    Smiling boy wearing goggles and lab coat in laboratory classroom — Stock Photo
    Smiling boy wearing goggles and lab coat in laboratory classroom
    Rear view of a Caucasian male field hockey player, training before a game, hitting a ball with a hockey stick, with the stadium in the background on a sunny day — Stock Photo
    Rear view of a Caucasian male field hockey player, training before a game, hitting a ball with a hockey stick, with the stadium in the background on a sunny day
    Side view of a multi-ethnic group of teenage male field hockey players and their Caucasian field hockey coach, training before a game, working out on a field hokey pitch, doing sit ups with their coach on a sunny day — Stock Photo
    Side view of a multi-ethnic group of teenage male field hockey players and their Caucasian field hockey coach, training before a game, working out on a field hokey pitch, doing sit ups with their coach on a sunny day
    Male teacher and girl students conducting scientific experiment at microscope and laptop in laboratory classroom — Stock Photo
    Male teacher and girl students conducting scientific experiment at microscope and laptop in laboratory classroom
    High angle side view of a Caucasian male teacher sitting in a classroom conducting a multi-ethnic group of teenage male and female musicians at a school band practice — Stock Photo
    High angle side view of a Caucasian male teacher sitting in a classroom conducting a multi-ethnic group of teenage male and female musicians at a school band practice
    Young female using tablet computer while studying at desk with classmates at desk in classroom — Stock Photo
    Young female using tablet computer while studying at desk with classmates at desk in classroom
    Students programming at computer in computer lab classroom — Stock Photo
    Students programming at computer in computer lab classroom
    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
    Junior high school students at desks in classroom — Stock Photo
    Junior high school students at desks in classroom
    Male teacher teaching students in the classroom at school — Stock Photo
    Male teacher teaching students in the classroom at school
    Human ovary structure — Stock Photo
    Human ovary structure
    Young college students practicing experiment in lab — Stock Photo
    Young college students practicing experiment in lab
    Students studying in the class at school — Stock Photo
    Students studying in the class at school
    Side view close up of a Caucasian sad teenage girl sitting on the ground alone in a schoolyard in a high school — Stock Photo
    Side view close up of a Caucasian sad teenage girl sitting on the ground alone in a schoolyard in a high school
    Side view of a multi-ethnic group of teenage male field hockey players, preparing before a game, sitting in a changing room, getting ready, tying shoes and focusing — Stock Photo
    Side view of a multi-ethnic group of teenage male field hockey players, preparing before a game, sitting in a changing room, getting ready, tying shoes and focusing
    Schoolkids walking in school campus on a sunny day — Stock Photo
    Schoolkids walking in school campus on a sunny day
    Boy playing table tennis — Stock Photo
    Boy playing table tennis
    Junior high school students studying in classroom — Stock Photo
    Junior high school students studying in classroom
    Ovary. Light micrograph (LM) of section through whole ovary. Cortex (outer region) contains numerous corpora lutea (pink) and follicles (purple) at various stages of development — Stock Photo
    Ovary. Light micrograph (LM) of section through whole ovary. Cortex (outer region) contains numerous corpora lutea (pink) and follicles (purple) at various stages of development
    Side view of a team of female Caucasian field hockey players, during a field hockey game, celebrating a goal, with disappointed opponents standing around them, on a sunny day — Stock Photo
    Side view of a team of female Caucasian field hockey players, during a field hockey game, celebrating a goal, with disappointed opponents standing around them, on a sunny day
    Portrait of a Caucasian female field hockey player, preparing before a game, standing on a hockey pitch, looking at camera, holding a hockey stick on her shoulders, with her teammates standing in the background on a sunny day — Stock Photo
    Portrait of a Caucasian female field hockey player, preparing before a game, standing on a hockey pitch, looking at camera, holding a hockey stick on her shoulders, with her teammates standing in the background on a sunny day
    Smiling female student playing acoustic guitar — Stock Photo
    Smiling female student playing acoustic guitar
    Curious girl student holding molecule model in classroom — Stock Photo
    Curious girl student holding molecule model in classroom
    Focused teenage boy with clipboard vlogging — Stock Photo
    Focused teenage boy with clipboard vlogging
    Portrait smiling teenage girls designing denim jacket in fashion design class — Stock Photo
    Portrait smiling teenage girls designing denim jacket in fashion design class
    Side view of a Caucasian and a mixed race teenage girls holding scripts, sitting on the stage of a school theatre during rehearsals for a performance — Stock Photo
    Side view of a Caucasian and a mixed race teenage girls holding scripts, sitting on the stage of a school theatre during rehearsals for a performance
    Portrait close up of a Caucasian musician teenage girl sitting by a window playing the violin in a high school — Stock Photo
    Portrait close up of a Caucasian musician teenage girl sitting by a window playing the violin in a high school
    Closeup on lettuce grown on an above-ground tray. — Stock Photo
    Closeup on lettuce grown on an above-ground tray.