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    Front view of a teenage African American girl in a school classroom sitting at desk, concentrating and reading, with teenage male classmates sitting at desks working in the background — Stock Photo
    Front view of a teenage African American girl in a school classroom sitting at desk, concentrating and reading, with teenage male classmates sitting at desks working in the background
    Male teacher leading lesson at touch screen in classroom — Stock Photo
    Male teacher leading lesson at touch screen in classroom
    Aerial view of Wuming Buddhist College at night of Seda County, Sichuan province, China — Stock Photo
    Aerial view of Wuming Buddhist College at night of Seda County, Sichuan province, China
    Side view of two Caucasian teenage girls with long dark hair sitting in front of a window holding a flute and a ukulele looking at each other and smiling — Stock Photo
    Side view of two Caucasian teenage girls with long dark hair sitting in front of a window holding a flute and a ukulele looking at each other and smiling
    Happy junior high schoolgirl — Stock Photo
    Happy junior high schoolgirl
    Front view of a Caucasian teenage boy sitting by a window holding an acoustic guitar, with a Caucasian teenage boy sitting behind him playing the saxophone in a high school — Stock Photo
    Front view of a Caucasian teenage boy sitting by a window holding an acoustic guitar, with a Caucasian teenage boy sitting behind him playing the saxophone in a high school
    High school students watching female teacher leading lesson at projection screen in classroom — Stock Photo
    High school students watching female teacher leading lesson at projection screen in classroom
    College students conducting scientific experiment in science laboratory classroom — Stock Photo
    College students conducting scientific experiment in science laboratory classroom
    High school teacher supervising students taking exam at desks — Stock Photo
    High school teacher supervising students taking exam at desks
    Portrait playful girl student holding molecular structure on head at microscope in laboratory classroom — Stock Photo
    Portrait playful girl student holding molecular structure on head at microscope in laboratory classroom
    Student playing with model in classroom — Stock Photo
    Student playing with model in classroom
    Rear view of teenage student girl walking in city during autumn — Stock Photo
    Rear view of teenage student girl walking in city during autumn
    Young female college student studying in cafe — Stock Photo
    Young female college student studying in cafe
    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
    Rear view of a teenage Caucasian male field hockey goalkeeper in action on the pitch, diving to stop a ball with a hockey stick, during a hockey match between two multi-ethnic teenage male teams on a sunny day, seen through the goal net — Stock Photo
    Rear view of a teenage Caucasian male field hockey goalkeeper in action on the pitch, diving to stop a ball with a hockey stick, during a hockey match between two multi-ethnic teenage male teams on a sunny day, seen through the goal net
    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
    Portrait of confident junior high school student leaving classroom — Stock Photo
    Portrait of confident junior high school student leaving classroom
    Young male basketball player dunking the ball into hoop with defenders below — Stock Photo
    Young male basketball player dunking the ball into hoop with defenders below
    Side view mid section of a teenage Caucasian boy using a smartphone, with his high school classmates hanging out and talking in the background in their school playground — Stock Photo
    Side view mid section of a teenage Caucasian boy using a smartphone, with his high school classmates hanging out and talking in the background in their school playground
    Young male college students studying in cafe — Stock Photo
    Young male college students studying in cafe
    Portrait smiling, confident female teacher wearing hijab in classroom — Stock Photo
    Portrait smiling, confident female teacher wearing hijab in classroom
    Curious students watching chemical reaction, conducting scientific experiment in laboratory classroom — Stock Photo
    Curious students watching chemical reaction, conducting scientific experiment in laboratory classroom
    Front view of a teenage Caucasian boy sitting a desk looking ahead and concentrating in a school classroom, with a row of teenage female classmates sitting at desks behind him — Stock Photo
    Front view of a teenage Caucasian boy sitting a desk looking ahead and concentrating in a school classroom, with a row of teenage female classmates sitting at desks behind him
    Junior high students using computer in computer lab — Stock Photo
    Junior high students using computer in computer lab
    Happy college students taking selfie with digital tablet in park — Stock Photo
    Happy college students taking selfie with digital tablet in park
    Ambitious young male college student looking away — Stock Photo
    Ambitious young male college student looking away
    Mature female professor teaching students — Stock Photo
    Mature female professor teaching students
    Side view mid section of boy and 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 mid section of boy and girl high school student sitting on chairs in an empty school theatre preparing before a performance, holding scripts and rehearsing together
    Junior high students raising hands — Stock Photo
    Junior high students raising hands
    A high school senior posing for her graduation portraits. — Stock Photo
    A high school senior posing for her graduation portraits.
    High school students talking and studying at table in classroom — Stock Photo
    High school students talking and studying at table in classroom
    Junior high schoolgirl making bar graph — Stock Photo
    Junior high schoolgirl making bar graph
    Mature female professor teaching students — Stock Photo
    Mature female professor teaching students
    Students examining liquids in test tube rack, conducting scientific experiment in laboratory classroom — Stock Photo
    Students examining liquids in test tube rack, conducting scientific experiment in laboratory classroom
    Portrait smiling, confident young male basketball player team celebrating, gesturing thumbs-up — Stock Photo
    Portrait smiling, confident young male basketball player team celebrating, gesturing thumbs-up
    Young woman writing in book — Stock Photo
    Young woman writing in book
    Happy female high school student sitting at classroom — Stock Photo
    Happy female high school student sitting at classroom
    Teenage girl sitting on bed at home and studying — Stock Photo
    Teenage girl sitting on bed at home and studying
    High school students taking exam at desks in classroom — Stock Photo
    High school students taking exam at desks in classroom
    Students painting in class over table — Stock Photo
    Students painting in class over table
    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
    Front view of a Caucasian teenage girl and boy sitting on the edge of the stage holding scripts and smiling at each other in an empty school theatre during rehearsals for a performance — Stock Photo
    Front view of a Caucasian teenage girl and boy sitting on the edge of the stage holding scripts and smiling at each other in an empty school theatre during rehearsals for a performance
    Junior high students using digital tablet — Stock Photo
    Junior high students using digital tablet
    Junior high students talking, hanging out — Stock Photo
    Junior high students talking, hanging out
    Female science teacher and girl student writing at whiteboard in classroom — Stock Photo
    Female science teacher and girl student writing at whiteboard in classroom
    Side view of a Caucasian female field hockey goalkeeper, during a field hockey game, protecting a goal from a ball, on a sunny day — Stock Photo
    Side view of a Caucasian female field hockey goalkeeper, during a field hockey game, protecting a goal from a ball, on a sunny day
    Chinese girl in school uniform with backpack — Stock Photo
    Chinese girl in school uniform with backpack
    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
    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
    High school teacher calling on students with hands raised during lesson in classroom — Stock Photo
    High school teacher calling on students with hands raised during lesson in classroom
    Portrait confident young man standing outside sunny building — Stock Photo
    Portrait confident young man standing outside sunny building
    School bus sign against a blue sky — Stock Photo
    School bus sign against a blue sky
    Portrait confident young woman in sweater and jeans — Stock Photo
    Portrait confident young woman in sweater and jeans
    Happy, laughing junior high school students in classroom — Stock Photo
    Happy, laughing junior high school students in classroom
    Two handsome teenage boys with skateboard standing on the bridge — Stock Photo
    Two handsome teenage boys with skateboard standing on the bridge
    Family of four walking down a cactus trail - their back to camera. — Stock Photo
    Family of four walking down a cactus trail - their back to camera.
    Focused boy students using digital tablet at microscope in laboratory classroom — Stock Photo
    Focused boy students using digital tablet at microscope in laboratory classroom
    College students studying at table together — Stock Photo
    College students studying at table together
    Front view close up of a Caucasian teenage girl sitting at a desk in a school classroom looking out of the window, with classmates sitting at desks in the background — Stock Photo
    Front view close up of a Caucasian teenage girl sitting at a desk in a school classroom looking out of the window, with classmates sitting at desks in the background
    Smiling high school students listening in debate class — Stock Photo
    Smiling high school students listening in debate class