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    Male teacher calling on students in classroom — Stock Photo
    Male teacher calling on students in classroom
    Teacher and students during chemistry lesson, wearing protective eyewear and looking at test tubes — Stock Photo
    Teacher and students during chemistry lesson, wearing protective eyewear and looking at test tubes
    France, Southern France, Vileveyrac, Cistercian abbey of Holy Mary of Valmagne, 13th century, gothic style, nave nave turned into a wine storehouse after the Revolution — Stock Photo
    France, Southern France, Vileveyrac, Cistercian abbey of Holy Mary of Valmagne, 13th century, gothic style, nave nave turned into a wine storehouse after the Revolution
    Elegant wedding rings on table — Stock Photo
    Elegant wedding rings on table
    Smiling male science teacher helping girl students conducting scientific experiment at microscope in laboratory — Stock Photo
    Smiling male science teacher helping girl students conducting scientific experiment at microscope in laboratory
    Schoolgirl writing on chalkboard in classroom at school — Stock Photo
    Schoolgirl writing on chalkboard in classroom at school
    Male student showing tablet computer to friend while standing in lab — Stock Photo
    Male student showing tablet computer to friend while standing in lab
    Schoolkids using digital tablet in classroom at school — Stock Photo
    Schoolkids using digital tablet in classroom at school
    Side view of two high school African American teenage female school pupils, using a smartphone and sitting on steps in the school grounds — Stock Photo
    Side view of two high school African American teenage female school pupils, using a smartphone and sitting on steps in the school grounds
    College students discussing while studying at desk in classroom — Stock Photo
    College students discussing while studying at desk in classroom
    Junior high school boys watching teacher during lesson in classroom — Stock Photo
    Junior high school boys watching teacher during lesson in classroom
    Focused junior high school girl student listening in classroom — Stock Photo
    Focused junior high school girl student listening in classroom
    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.
    Side view of a group of female Caucasian field hockey players, preparing before a game, huddling, interacting, motivating, bending down, on a sunny day — Stock Photo
    Side view of a group of female Caucasian field hockey players, preparing before a game, huddling, interacting, motivating, bending down, on a sunny day
    High school students with hands raised during lesson in classroom — Stock Photo
    High school students with hands raised during lesson in classroom
    Smiling high school girl student leaving classroom — Stock Photo
    Smiling high school girl student leaving classroom
    University students sitting at desk in classroom — Stock Photo
    University students sitting at desk in classroom
    Female students performing chemistry experiment in lab — Stock Photo
    Female students performing chemistry experiment in lab
    Young woman using tablet computer while studying at desk with classmates at desk in classroom — Stock Photo
    Young woman using tablet computer while studying at desk with classmates at desk in classroom
    Portrait of confident junior high students — Stock Photo
    Portrait of confident junior high students
    Students using digital tablet and laptop in library — Stock Photo
    Students using digital tablet and laptop in library
    Students researching at computer in dark classroom — Stock Photo
    Students researching at computer in dark classroom
    Side view close up of a multi-ethnic group of teenage male and female choristers holding sheet music and laughing, standing on the stage of a school theatre during a break in rehearsals for a performance — Stock Photo
    Side view close up of a multi-ethnic group of teenage male and female choristers holding sheet music and laughing, standing on the stage of a school theatre during a break in rehearsals for a performance
    Junior high school student raising hand, asking a question during lesson in classroom — Stock Photo
    Junior high school student raising hand, asking a question during lesson in classroom
    Digital molecular model of secondary structure of immunoglobulin G antibody. — Stock Photo
    Digital molecular model of secondary structure of immunoglobulin G antibody.
    High school students and teacher clapping debate class — Stock Photo
    High school students and teacher clapping debate class
    Central Asia, Kyrgyzstan, Issyk Kul Province (Ysyk-K?l), Juuku valley, the shepherd Gengibek Makanbietov leads his 24 horses in the mountains pasture — Stock Photo
    Central Asia, Kyrgyzstan, Issyk Kul Province (Ysyk-K?l), Juuku valley, the shepherd Gengibek Makanbietov leads his 24 horses in the mountains pasture
    University students practicing experiment in lab — Stock Photo
    University students practicing experiment in lab
    High angle view of teenage girl practicing experiment in lab — Stock Photo
    High angle view of teenage girl practicing experiment in lab
    Junior high school students using computer in classroom — Stock Photo
    Junior high school students using computer in classroom
    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
    Digital molecular model of secondary structure of immunoglobulin G antibodies. — Stock Photo
    Digital molecular model of secondary structure of immunoglobulin G antibodies.
    Front view of a multi-ethnic group of teenage school pupils standing together in a classroom looking at a tablet computer and smiling at break time — Stock Photo
    Front view of a multi-ethnic group of teenage school pupils standing together in a classroom looking at a tablet computer and smiling at break time
    High school students watching teacher at projection screen during lesson in classroom — Stock Photo
    High school students watching teacher at projection screen during lesson in classroom
    Focused junior high school student using digital tablet in classroom — Stock Photo
    Focused junior high school student using digital tablet in classroom
    Portrait of confident junior high teacher in library — Stock Photo
    Portrait of confident junior high teacher in library
    Rear view of a multi-ethnic group of male and female teenage students talking as they walk through their school grounds — Stock Photo
    Rear view of a multi-ethnic group of male and female teenage students talking as they walk through their school grounds
    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
    Student using laptop in the classroom at school — Stock Photo
    Student using laptop in the classroom at school
    Four hanging in the air colorful balloons with smiley on red against grey wall — Stock Photo
    Four hanging in the air colorful balloons with smiley on red against grey wall
    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
    Front view of a multi-ethnic group of teenage male field hockey players, training before a game, working out on a field hockey pitch, running on a sunny day — Stock Photo
    Front view of a multi-ethnic group of teenage male field hockey players, training before a game, working out on a field hockey pitch, running on a sunny day
    France, Seine et Marne. Crafts. Close up of candied clementines. — Stock Photo
    France, Seine et Marne. Crafts. Close up of candied clementines.
    Side view of a multi-ethnic group of male field hockey players and their Caucasian male coach, preparing before a game, standing in a row on the pitch with their arms around each others shoulders on a sunny day — Stock Photo
    Side view of a multi-ethnic group of male field hockey players and their Caucasian male coach, preparing before a game, standing in a row on the pitch with their arms around each others shoulders on a sunny day
    Male teacher teaching students in the classroom at school — Stock Photo
    Male teacher teaching students in the classroom at school
    Elegant wedding rings on table — Stock Photo
    Elegant wedding rings on table
    Male teacher teaching students in the classroom at school — Stock Photo
    Male teacher teaching students in the classroom at school
    Side view of young male student studying at desk by window in classroom — Stock Photo
    Side view of young male student studying at desk by window in classroom
    Close up of young female college student looking at chemical while practicing experiment in lab — Stock Photo
    Close up of young female college student looking at chemical while practicing experiment in lab
    Portrait of female student with arms crossed standing in lab — Stock Photo
    Portrait of female student with arms crossed standing in lab
    Attentive high school students listening in classroom — Stock Photo
    Attentive high school students listening in classroom
    Smiling female science teacher leading lesson at projection screen in classroom — Stock Photo
    Smiling female science teacher leading lesson at projection screen in classroom
    Schoolkids holding sketch pens in classroom at school — Stock Photo
    Schoolkids holding sketch pens in classroom at school
    Front view of a group of female Caucasian field hockey players, training before a game, working out on a field hockey pitch, doing push ups, on a sunny day — Stock Photo
    Front view of a group of female Caucasian field hockey players, training before a game, working out on a field hockey pitch, doing push ups, on a sunny day
    Boy playing table tennis — Stock Photo
    Boy playing table tennis
    Students watching chemical reaction, conducting scientific experiment in laboratory classroom — Stock Photo
    Students watching chemical reaction, conducting scientific experiment in laboratory classroom
    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
    Secondary liver cancer — Stock Photo
    Secondary liver cancer
    Portrait of confident junior high school student leaving classroom — Stock Photo
    Portrait of confident junior high school student leaving classroom
    Side view of a male Caucasian teacher standing and talking with a teenage African American female high school student working on a computer and concentrating in a classroom — Stock Photo
    Side view of a male Caucasian teacher standing and talking with a teenage African American female high school student working on a computer and concentrating in a classroom