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    Happy junior high schoolgirl — Stock Photo
    Happy junior high schoolgirl
    Smiling teenage girl leaning on wall — Stock Photo
    Smiling teenage girl leaning on wall
    Portrait of confident teacher — Stock Photo
    Portrait of confident teacher
    Chinese children looking at exhibition in museum — Stock Photo
    Chinese children looking at exhibition in museum
    Portrait of confident teacher — Stock Photo
    Portrait of confident teacher
    Cheerful stylish man headphones with backpack raising hand celebrating victory and jumping clasping foot on background — Stock Photo
    Cheerful stylish man headphones with backpack raising hand celebrating victory and jumping clasping foot on background
    Portrait confident young man outside sunny building — Stock Photo
    Portrait confident young man outside sunny building
    Happy boy using digital tablet — Stock Photo
    Happy boy using digital tablet
    Focused Chinese school students sitting at desks and studying in rural primary school — Stock Photo
    Focused Chinese school students sitting at desks and studying in rural primary school
    Rear view of boy raising hand — Stock Photo
    Rear view of boy raising hand
    Female friends entering university — Stock Photo
    Female friends entering university
    Junior high students writing — Stock Photo
    Junior high students writing
    Stylish man in bright headphones surfing mobile phone while leaning on marble wall in sunny day looking away — Stock Photo
    Stylish man in bright headphones surfing mobile phone while leaning on marble wall in sunny day looking away
    Chinese college students walking down steps of university building — Stock Photo
    Chinese college students walking down steps of university building
    Pupils gathered around a molecular model — Stock Photo
    Pupils gathered around a molecular model
    Cute boy raising finger — Stock Photo
    Cute boy raising finger
    Young man using mobile phone outside library building — Stock Photo
    Young man using mobile phone outside library building
    Schoolboy raising hand — Stock Photo
    Schoolboy raising hand
    Primary school students sitting at desks in rural primary school, selective focus — Stock Photo
    Primary school students sitting at desks in rural primary school, selective focus
    Rural female teacher and pupils using laptop together in classroom — Stock Photo
    Rural female teacher and pupils using laptop together in classroom
    Portrait of focused chinese schoolgirl studying in rural primary school — Stock Photo
    Portrait of focused chinese schoolgirl studying in rural primary school
    Positive African American female student with copybooks text messaging on cellphone while standing in university campus during studies on sunny day — Stock Photo
    Positive African American female student with copybooks text messaging on cellphone while standing in university campus during studies on sunny day
    Portrait of confident schoolgirl — Stock Photo
    Portrait of confident schoolgirl
    Rows of comfortable seats located inside empty lecture hall before lesson in contemporary university — Stock Photo
    Rows of comfortable seats located inside empty lecture hall before lesson in contemporary university
    Rear view of schoolboy writing — Stock Photo
    Rear view of schoolboy writing
    Teacher standing in front of students — Stock Photo
    Teacher standing in front of students
    Pensive African American female student with thermos and bunch of textbooks looking away while standing on street near university building — Stock Photo
    Pensive African American female student with thermos and bunch of textbooks looking away while standing on street near university building
    Side view of male student with workbooks looking away with thoughtful face while standing near modern university building on street during studies — Stock Photo
    Side view of male student with workbooks looking away with thoughtful face while standing near modern university building on street during studies
    Portrait confident young man standing outside sunny building — Stock Photo
    Portrait confident young man standing outside sunny building
    Rear view of schoolgirl — Stock Photo
    Rear view of schoolgirl
    Schoolgirl writing in book — Stock Photo
    Schoolgirl writing in book
    Portrait of happy school students — Stock Photo
    Portrait of happy school students
    Student writing formula and equations — Stock Photo
    Student writing formula and equations
    Female freelancer using laptop in courtyard — Stock Photo
    Female freelancer using laptop in courtyard
    Students using laptops in a lesson. — Stock Photo
    Students using laptops in a lesson.
    College students talking and laughing in corridor — Stock Photo
    College students talking and laughing in corridor
    Cropped unrecognizable female in stylish clothes sitting with opened book on wooden bench against building with light wall in daytime — Stock Photo
    Cropped unrecognizable female in stylish clothes sitting with opened book on wooden bench against building with light wall in daytime
    Group of children climbing up the ropes. — Stock Photo
    Group of children climbing up the ropes.
    Kindergarten children playing in the recreation room — Stock Photo
    Kindergarten children playing in the recreation room
    From below male student in casual clothes and eyeglasses with modern netbook in hand walking on street near modern building — Stock Photo
    From below male student in casual clothes and eyeglasses with modern netbook in hand walking on street near modern building
    Modern science center building and Tigutorn Tower in Tartu, Estonia, Europe — Stock Photo
    Modern science center building and Tigutorn Tower in Tartu, Estonia, Europe
    Rural female teacher and pupils using laptop together in classroom — Stock Photo
    Rural female teacher and pupils using laptop together in classroom
    Blond girl in trench-coat with leather briefcase walking in front of wooden house — Stock Photo
    Blond girl in trench-coat with leather briefcase walking in front of wooden house
    Young women friends in hijabs talking outside sunny building — Stock Photo
    Young women friends in hijabs talking outside sunny building
    Europe, Grece, Plain of Thessaly, Valley of Penee, World Heritage of UNESCO since 1988, Orthodox Christian monasteries of Meteora perched atop impressive gray rock sculpted by erosion, the Roussanou convent — Stock Photo
    Europe, Grece, Plain of Thessaly, Valley of Penee, World Heritage of UNESCO since 1988, Orthodox Christian monasteries of Meteora perched atop impressive gray rock sculpted by erosion, the Roussanou convent
    Portrait of schoolboy opening door of school — Stock Photo
    Portrait of schoolboy opening door of school
    Abstract wooden building facade with multiply stacks, Tartu, Estonia — Stock Photo
    Abstract wooden building facade with multiply stacks, Tartu, Estonia
    Young elegant woman in eyeglasses holding book and descending on stairs in front of building in city — Stock Photo
    Young elegant woman in eyeglasses holding book and descending on stairs in front of building in city
    Junior high students studying — Stock Photo
    Junior high students studying
    The Italia Statue, Glasgow University, Glasgow Scotland — Stock Photo
    The Italia Statue, Glasgow University, Glasgow Scotland
    Drinking fountains near male and female restrooms doors — Stock Photo
    Drinking fountains near male and female restrooms doors
    Chinese children visiting science and technology museum — Stock Photo
    Chinese children visiting science and technology museum
    Thoughtful schoolboy sitting at desk — Stock Photo
    Thoughtful schoolboy sitting at desk
    Locker rooms with red doors at school sports stadium — Stock Photo
    Locker rooms with red doors at school sports stadium
    Kindergarten children playing in the recreation room — Stock Photo
    Kindergarten children playing in the recreation room
    Portrait of schoolboy in classroom — Stock Photo
    Portrait of schoolboy in classroom
    Girl studying at home — Stock Photo
    Girl studying at home
    Two students sitting in schoolyard with laptop and coffee cup — Stock Photo
    Two students sitting in schoolyard with laptop and coffee cup
    Portrait of confident boy — Stock Photo
    Portrait of confident boy
    Chinese school students studying with textbooks in rural primary school — Stock Photo
    Chinese school students studying with textbooks in rural primary school