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    Girl student programming and assembling robotics in classroom — Stock Photo
    Girl student programming and assembling robotics in classroom
    Girl student conducting scientific experiment in laboratory classroom — Stock Photo
    Girl student conducting scientific experiment in laboratory classroom
    Front view of a group of female Caucasian field hockey players preparing before a game, standing in a changing room, one is putting her hand on a shoulder of her teammate — Stock Photo
    Front view of a group of female Caucasian field hockey players preparing before a game, standing in a changing room, one is putting her hand on a shoulder of her teammate
    Portrait smiling, confident girl student holding robot — Stock Photo
    Portrait smiling, confident girl student holding robot
    Portrait of a Caucasian teenage boy sitting at a desk in a school classroom looking out of the window, thinking — Stock Photo
    Portrait of a Caucasian teenage boy sitting at a desk in a school classroom looking out of the window, thinking
    Schoolkids holding hands in school campus on a sunny day — Stock Photo
    Schoolkids holding hands in school campus on a sunny day
    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
    High school students talking and studying at table in classroom — Stock Photo
    High school students talking and studying at table in classroom
    Digital molecular model of secondary structure of immunoglobulin G antibody. — Stock Photo
    Digital molecular model of secondary structure of immunoglobulin G antibody.
    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
    Front view of three Caucasian teenage boys and a mixed race teenage girl holding scripts and smiling, sitting on the stage of a school theatre during rehearsals for a performance — Stock Photo
    Front view of three Caucasian teenage boys and a mixed race teenage girl holding scripts and smiling, sitting on the stage of a school theatre during rehearsals for a performance
    Cropped image of female university student using laptop at desk in classroom — Stock Photo
    Cropped image of female university student using laptop at desk in classroom
    Secondary follicles in an ovary — Stock Photo
    Secondary follicles in an ovary
    Front view close up of a Caucasian teenage boy sitting at a desk in a school classroom writing in a notebook, with a classmate sitting at a desk in the background — Stock Photo
    Front view close up of a Caucasian teenage boy sitting at a desk in a school classroom writing in a notebook, with a classmate sitting at a desk in the background
    Smiling male teacher leading lesson in classroom — Stock Photo
    Smiling male teacher leading lesson in classroom
    Portrait of smiling, confident junior high school girl in classroom — Stock Photo
    Portrait of smiling, confident junior high school girl in classroom
    Front view of a group of female Caucasian field hockey players preparing before a game, sitting on a stand, holding hockey sticks, with their Caucasian male field hockey coach standing in front of them, talking about game plan on a sunny day — Stock Photo
    Front view of a group of female Caucasian field hockey players preparing before a game, sitting on a stand, holding hockey sticks, with their Caucasian male field hockey coach standing in front of them, talking about game plan on a sunny day
    Side view of a Caucasian male field hockey coach standing and interacting with a multi-ethnic group of teenage male field hockey players, sitting in a changing room listening to his instructions — Stock Photo
    Side view of a Caucasian male field hockey coach standing and interacting with a multi-ethnic group of teenage male field hockey players, sitting in a changing room listening to his instructions
    Side view of a Caucasian female field hockey players, after a field hockey game, kneeling, leaning her head on a hockey stick with disappointment, with her teammates in the background, on a sunny day — Stock Photo
    Side view of a Caucasian female field hockey players, after a field hockey game, kneeling, leaning her head on a hockey stick with disappointment, with her teammates in the background, on a sunny day
    Secondary brain cancer — Stock Photo
    Secondary brain cancer
    Portrait of a Caucasian male field hockey coach, preparing his team for a game, standing on a hockey pitch, looking at camera, with his team standing in the background on a sunny day — Stock Photo
    Portrait of a Caucasian male field hockey coach, preparing his team for a game, standing on a hockey pitch, looking at camera, with his team standing in the background on a sunny day
    Front view of a multi-ethnic group of teenage school pupils and their Caucasian male teacher standing in a classroom looking at laptop computers together, the pupils listening while the teacher talks — Stock Photo
    Front view of a multi-ethnic group of teenage school pupils and their Caucasian male teacher standing in a classroom looking at laptop computers together, the pupils listening while the teacher talks
    Secondary tuberculosis lungs infection and close-up of Mycobacterium tuberculosis bacteria. — Stock Photo
    Secondary tuberculosis lungs infection and close-up of Mycobacterium tuberculosis bacteria.
    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
    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
    Junior high school students studying in classroom — Stock Photo
    Junior high school students studying in classroom
    Science teacher helping girl student at microscope in classroom laboratory — Stock Photo
    Science teacher helping girl student at microscope in classroom laboratory
    High school teacher helping students studying in classroom — Stock Photo
    High school teacher helping 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 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
    Surprised students conducting exploding foam scientific experiment in classroom laboratory — Stock Photo
    Surprised students conducting exploding foam scientific experiment in classroom laboratory
    Female high school teacher helping girl student doing homework in classroom — Stock Photo
    Female high school teacher helping girl student doing homework in classroom
    Portrait smiling, confident high school girl in stairway — Stock Photo
    Portrait smiling, confident high school girl in stairway
    Junior high school boy student doing homework in classroom — Stock Photo
    Junior high school boy student doing homework in classroom
    Girl student using microscope in classroom — Stock Photo
    Girl student using microscope in classroom
    Female teacher and girl students examining molecular structure in classroom — Stock Photo
    Female teacher and girl students examining molecular structure in classroom
    Side view of a Caucasian female field hockey players, preparing before a game, standing in a changing room, wearing a hockey helmet, with her teammates standing in a row behind her — Stock Photo
    Side view of a Caucasian female field hockey players, preparing before a game, standing in a changing room, wearing a hockey helmet, with her teammates standing in a row behind her
    Male science teacher and students conducting scientific experiment in laboratory classroom — Stock Photo
    Male science teacher and students conducting scientific experiment in laboratory classroom
    Side view of a team of female Caucasian field hockey players, after a field hockey game, celebrating a goal, with disappointed opponents kneeling and squatting in the foreground on a sunny day — Stock Photo
    Side view of a team of female Caucasian field hockey players, after a field hockey game, celebrating a goal, with disappointed opponents kneeling and squatting in the foreground on a sunny day
    Side view of a teenage African American male high school student reading to a multi-ethnic class of teenagers sitting at desks in a school classroom listening and concentrating — Stock Photo
    Side view of a teenage African American male high school student reading to a multi-ethnic class of teenagers sitting at desks in a school classroom listening and concentrating
    Junior high school students doing homework at desks in classroom — Stock Photo
    Junior high school students doing homework at desks in classroom
    Portrait of a mixed race teenage girl with long, dark hair and brown eyes standing in a school classroom smiling to camera, with classmates talking in the background — Stock Photo
    Portrait of a mixed race teenage girl with long, dark hair and brown eyes standing in a school classroom smiling to camera, with classmates talking in the background
    Portrait confident junior high school boy studying in classroom — Stock Photo
    Portrait confident junior high school boy studying in classroom
    Female high school teacher helping girl student studying at table in classroom — Stock Photo
    Female high school teacher helping girl student studying at table in classroom
    Metastatic breast cancer — Stock Photo
    Metastatic breast cancer
    Smiling male science teacher leading lesson at whiteboard in classroom — Stock Photo
    Smiling male science teacher leading lesson at whiteboard 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, holding a digital tablet — 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, holding a digital tablet
    Surprised students conducting exploding foam scientific experiment in classroom laboratory — Stock Photo
    Surprised students conducting exploding foam scientific experiment in classroom laboratory
    Close up of male student practicing experiment in lab — Stock Photo
    Close up of male student practicing experiment in lab
    Tween boys playing basketball in schoolyard — Stock Photo
    Tween boys playing basketball in schoolyard
    Female students discussing at desk in classroom — Stock Photo
    Female students discussing at desk in classroom
    Portrait of confident teachers in library with students — Stock Photo
    Portrait of confident teachers in library with students
    Teenage girl holding pipette while practicing chemistry experiment at desk in lab — Stock Photo
    Teenage girl holding pipette while practicing chemistry experiment at desk in lab
    Portrait close up of a Caucasian teenage boy with dark hair and grey eyes sitting at a desk in a school classroom wearing headphones around his neck, smiling 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 wearing headphones around his neck, smiling to camera
    Rear view of two Caucasian teenage couples with schoolbags holding hands and walking across a school playing field on a sunny day — Stock Photo
    Rear view of two Caucasian teenage couples with schoolbags holding hands and walking across a school playing field on a sunny day
    Schoolboy looking at globe in classroom at school — Stock Photo
    Schoolboy looking at globe in classroom at school
    Side view of a teenage Caucasian boy in a school classroom sitting at desk, concentrating and writing, with teenage mixed race male and African American female classmates sitting at desks working in the on either side of him — Stock Photo
    Side view of a teenage Caucasian boy in a school classroom sitting at desk, concentrating and writing, with teenage mixed race male and African American female classmates sitting at desks working in the on either side of him
    Side 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 exercises, preparing for shooting training on a sunny day — Stock Photo
    Side 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 exercises, preparing for shooting training on a sunny day
    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
    Portrait of confident junior high school student leaving classroom — Stock Photo
    Portrait of confident junior high school student leaving classroom