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    Portrait of a Caucasian musician teenage girl sitting by a window, looking down and playing a ukulele in a high school — Stock Photo
    Portrait of a Caucasian musician teenage girl sitting by a window, looking down and playing a ukulele in a high school
    Rear view of a multi-ethnic group of teenage male and female school pupils with schoolbags hanging out, walking in their high school grounds, one carrying a skateboard — 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, one carrying a skateboard
    Driving south on Chuckanut Drive out of Belllingham on an October day with the leaves on the trees turning yellow; Washington, United States of America — Stock Photo
    Driving south on Chuckanut Drive out of Belllingham on an October day with the leaves on the trees turning yellow; Washington, United States of America
    High school students talking at table in debate class — Stock Photo
    High school students talking at table in debate class
    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 close up of a Caucasian teenage boy with short dark hair and grey eyes standing in a school classroom smiling to camera, with classmates talking in the background — Stock Photo
    Portrait close up of a Caucasian teenage boy with short dark hair and grey eyes standing in a school classroom smiling to camera, with classmates talking in the background
    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, 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, on a sunny day
    Portrait confident junior high school boy studying in classroom — Stock Photo
    Portrait confident junior high school boy studying in classroom
    Side view of a multi-ethnic group of teenage male field hockey players training before a game, working out in a row, doing push ups on a hockey pitch on a sunny day — Stock Photo
    Side view of a multi-ethnic group of teenage male field hockey players training before a game, working out in a row, doing push ups on a hockey pitch on a sunny day
    Digital molecular model of secondary structure of immunoglobulin G antibodies. — Stock Photo
    Digital molecular model of secondary structure of immunoglobulin G antibodies.
    Male student showing clipboard to classmate while practicing chemistry experiment in lab — Stock Photo
    Male student showing clipboard to classmate while practicing chemistry experiment in lab
    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
    High school girl students with hands raised during lesson in classroom — Stock Photo
    High school girl students with hands raised during lesson in classroom
    High school students with hands raised asking questions during lesson in classroom — Stock Photo
    High school students with hands raised asking questions during lesson in classroom
    Schoolkids holding sketch pens in classroom at school — Stock Photo
    Schoolkids holding sketch pens in classroom at school
    Schoolboy standing near chalkboard in classroom at school — Stock Photo
    Schoolboy standing near chalkboard in classroom at school
    Side view of a teenage Caucasian male field hockey player, training on the hockey pitch before a game, preparing to hit the ball with a hockey stick, with his teammates and coach in the background on a sunny day — Stock Photo
    Side view of a teenage Caucasian male field hockey player, training on the hockey pitch before a game, preparing to hit the ball with a hockey stick, with his teammates and coach in the background on a sunny day
    Tables in empty classroom — Stock Photo
    Tables in empty 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
    Junior high students leaving school building, descending steps — Stock Photo
    Junior high students leaving school building, descending steps
    Side view of a Caucasian sad teenage girl sitting on the ground alone in a schoolyard in a high school — Stock Photo
    Side view 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 high school teenage male and female school pupils hanging out, talking and looking at a smartphone together, sitting on steps in their school grounds — Stock Photo
    Side view of a multi-ethnic group of high school teenage male and female school pupils hanging out, talking and looking at a smartphone together, sitting on steps in their school grounds
    Surprised students conducting exploding foam scientific experiment in classroom laboratory — Stock Photo
    Surprised students conducting exploding foam scientific experiment in classroom laboratory
    Side view of a African American teenage girl in an empty high school theatre, sitting in the auditorium preparing for a performance, holding a script and learning lines — Stock Photo
    Side view of a African American teenage girl in an empty high school theatre, sitting in the auditorium preparing for a performance, holding a script and learning lines
    Science teacher helping girl student at microscope in classroom laboratory — Stock Photo
    Science teacher helping girl student at microscope in classroom laboratory
    Portrait close up of a Caucasian teenage boy with short dark hair and grey eyes standing in a school classroom smiling to camera, with classmates talking in the background — Stock Photo
    Portrait close up of a Caucasian teenage boy with short dark hair and grey eyes standing in a school classroom smiling to camera, with classmates talking in the background
    Female student using microscope while practicing experiment in lab — Stock Photo
    Female student using microscope while practicing experiment in lab
    Surprised students conducting scientific experiment, watching chemical reaction in classroom laboratory — Stock Photo
    Surprised students conducting scientific experiment, watching chemical reaction in classroom laboratory
    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).
    High school students studying at tables in classroom — Stock Photo
    High school students studying at tables in classroom
    Smiling male teacher and students programming robotics at laptop in classroom — Stock Photo
    Smiling male teacher and students programming robotics at laptop in classroom
    Portrait close up of a Caucasian male field hockey goalkeeper, wearing black hockey uniform and a helmet, standing on the pitch and looking to camera, with his teammates in the background on a sunny day — Stock Photo
    Portrait close up of a Caucasian male field hockey goalkeeper, wearing black hockey uniform and a helmet, standing on the pitch and looking to camera, with his teammates in the background on a sunny day
    Junior high school students using computer in classroom — Stock Photo
    Junior high school students using computer in classroom
    Schoolkids looking at globe in classroom at school — Stock Photo
    Schoolkids looking at globe in classroom at school
    Secondary tuberculosis lungs infection and close-up of Mycobacterium tuberculosis bacteria. — Stock Photo
    Secondary tuberculosis lungs infection and close-up of Mycobacterium tuberculosis bacteria.
    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
    Side view of two Caucasian teenage girls with long dark hair sitting in front of a window playing a flute and a ukulele and looking to camera — Stock Photo
    Side view of two Caucasian teenage girls with long dark hair sitting in front of a window playing a flute and a ukulele and looking to camera
    Schoolboy explaining about world map in classroom at school — Stock Photo
    Schoolboy explaining about world map in classroom at school
    Side view of a teenage Caucasian male field hockey player, standing alone in a corridor wearing a helmet, preparing and focusing before a game — Stock Photo
    Side view of a teenage Caucasian male field hockey player, standing alone in a corridor wearing a helmet, preparing and focusing before a game
    Smiling girl conducting scientific experiment in laboratory classroom — Stock Photo
    Smiling girl conducting scientific experiment in laboratory classroom
    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
    Front view of a Caucasian teenage girl and boy embracing and smiling while the boy takes a selfie of them with a smartphone in their school grounds, another teenage couple sitting in the background — Stock Photo
    Front view of a Caucasian teenage girl and boy embracing and smiling while the boy takes a selfie of them with a smartphone in their school grounds, another teenage couple sitting in the background
    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.
    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
    Students using digital tablet and laptop in library — Stock Photo
    Students using digital tablet and laptop in library
    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
    High school teacher helping students studying in classroom — Stock Photo
    High school teacher helping students studying 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.
    Junior high school students enjoying lesson at desks in classroom — Stock Photo
    Junior high school students enjoying lesson at desks in classroom
    Junior high school student removing headphones from backpack in classroom — Stock Photo
    Junior high school student removing headphones from backpack in classroom
    Focused high school girl student studying in classroom — Stock Photo
    Focused high school girl student studying in classroom
    Junior high students using computer in computer lab — Stock Photo
    Junior high students using computer in computer lab
    Boy student holding and examining molecular structure — Stock Photo
    Boy student holding and examining molecular structure
    Side view of a teenage Caucasian male field hockey player, preparing to hit a ball on the pitch during a hockey game between two multi-ethnic teenage male teams, on a sunny day — Stock Photo
    Side view of a teenage Caucasian male field hockey player, preparing to hit a ball on the pitch during a hockey game between two multi-ethnic teenage male teams, on a sunny day
    Smiling female students studying at desk in classroom — Stock Photo
    Smiling female students studying at desk in classroom
    Surprised students conducting exploding foam scientific experiment in classroom laboratory — Stock Photo
    Surprised students conducting exploding foam scientific experiment in classroom laboratory
    Digital molecular model of secondary structure of immunoglobulin G antibodies. — Stock Photo
    Digital molecular model of secondary structure of immunoglobulin G antibodies.
    Schoolkids using digital tablet in classroom at school — Stock Photo
    Schoolkids using digital tablet in classroom at school
    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
    Secondary tuberculosis lungs infection and close-up of Mycobacterium tuberculosis bacteria. — Stock Photo
    Secondary tuberculosis lungs infection and close-up of Mycobacterium tuberculosis bacteria.