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    Junior high students talking in library — Stock Photo
    Junior high students talking in library
    Side view of a teenage Caucasian boy in a school classroom sitting at desk, concentrating and smiling, with teenage male and female classmates sitting at desks working in the background — Stock Photo
    Side view of a teenage Caucasian boy in a school classroom sitting at desk, concentrating and smiling, with teenage male and female classmates sitting at desks working in the background
    Portrait of teenage girl holding tablet while sitting by machinery in lab — Stock Photo
    Portrait of teenage girl holding tablet while sitting by machinery in lab
    Front view of a teenage mixed-race boy in a school classroom sitting at desk, raising his hand to answer a question, 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, raising his hand to answer a question, with teenage male and female classmates sitting at desks working in the background
    Junior high school students using virtual reality simulators in classroom — Stock Photo
    Junior high school students using virtual reality simulators in classroom
    Young college students practicing experiment in lab — Stock Photo
    Young college students practicing experiment in lab
    Female teacher and students programming and assembling robotics in classroom — Stock Photo
    Female teacher and students programming and assembling robotics in classroom
    Courtyard Of Coimbra University — Stock Photo
    Courtyard Of Coimbra University
    Front view of a Caucasian teenage girl and boy smiling at each other and holding hands, sitting in a school playing field — Stock Photo
    Front view of a Caucasian teenage girl and boy smiling at each other and holding hands, sitting in a school playing field
    Side view of a multi-ethnic group of male and female teenager students sitting on a wall talking and using tablet computers in their school grounds — Stock Photo
    Side view of a multi-ethnic group of male and female teenager students sitting on a wall talking and using tablet computers in their school grounds
    Junior high students talking — Stock Photo
    Junior high students talking
    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
    Students conducting scientific experiment in laboratory classroom — Stock Photo
    Students conducting scientific experiment in laboratory classroom
    Portrait smiling, confident girl student next to DNA model in classroom — Stock Photo
    Portrait smiling, confident girl student next to DNA model in classroom
    Smiling female student playing acoustic guitar — Stock Photo
    Smiling female student playing acoustic guitar
    Portrait confidant high school girl student studying in classroom — Stock Photo
    Portrait confidant high school girl student studying in classroom
    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
    Teenage female student using digital tablet in desk in classroom — Stock Photo
    Teenage female student using digital tablet in desk in classroom
    Attentive high school students listening in classroom — Stock Photo
    Attentive high school students listening in classroom
    Female teacher and students examining DNA model in classroom — Stock Photo
    Female teacher and students examining DNA model in classroom
    Teenage female college student using digital tablet in desk in classroom — Stock Photo
    Teenage female college student using digital tablet in desk in classroom
    Junior high students talking in library — Stock Photo
    Junior high students talking in library
    Front view mid section of teenage boy musician standing playing a saxophone front of a window during a school band practice — Stock Photo
    Front view mid section of teenage boy musician standing playing a saxophone front of a window during a school band practice
    Side view of multi-ethnic group of high school teenagers in a school classroom sitting at desks, all raising their hands to answer a question — Stock Photo
    Side view of multi-ethnic group of high school teenagers in a school classroom sitting at desks, all raising their hands to answer a question
    Man assisting female friend while studying at desk in classroom — Stock Photo
    Man assisting female friend while studying at desk in classroom
    Junior high school students using virtual reality simulators in classroom — Stock Photo
    Junior high school students using virtual reality simulators in classroom
    Front view of a teenage Caucasian boy in a school classroom sitting at desk, concentrating and looking out of the window, with teenage male and female classmates sitting at desks working in the background — Stock Photo
    Front view of a teenage Caucasian boy in a school classroom sitting at desk, concentrating and looking out of the window, with teenage male and female classmates sitting at desks working in the background
    Low angle view of young college students at desk while sitting classroom — Stock Photo
    Low angle view of young college students at desk while sitting classroom
    Female student using microscope while practicing experiment in lab — Stock Photo
    Female student using microscope while practicing experiment in lab
    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
    High angle view of a multi-ethnic group of teenage school pupils sitting and standing around a table in a classroom looking at laptop and tablet computers together and talking at break time — Stock Photo
    High angle view of a multi-ethnic group of teenage school pupils sitting and standing around a table in a classroom looking at laptop and tablet computers together and talking at break time
    Pensive girl student conducting science experiment in classroom laboratory — Stock Photo
    Pensive girl student conducting science experiment in classroom laboratory
    Teenage female practicing chemistry experiment in lab — Stock Photo
    Teenage female practicing chemistry experiment in lab
    Focused high school girl student studying in classroom — Stock Photo
    Focused high school girl student studying in classroom
    Curious girl student examining molecular structure in classroom — Stock Photo
    Curious girl student examining molecular structure in classroom
    Portrait close up of a Caucasian teenage boy with dark hair and grey eyes sitting at a desk in a school classroom looking straight 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 looking straight to camera
    High school students talking in classroom — Stock Photo
    High school students talking in classroom
    High school students with hands raised in classroom — Stock Photo
    High school students with hands raised in classroom
    Junior high school students watching teacher give lesson at projection screen in classroom — Stock Photo
    Junior high school students watching teacher give lesson at projection screen in classroom
    Teenage girl using digital tablet while sitting in library — Stock Photo
    Teenage girl using digital tablet while sitting in library
    Group portrait of a multi-ethnic group of eight teenage male and female musicians sitting in a row in a classroom holding their instruments during a school band practice — Stock Photo
    Group portrait of a multi-ethnic group of eight teenage male and female musicians sitting in a row in a classroom holding their instruments during a school band practice
    Young male college student practicing experiment while standing in lab — Stock Photo
    Young male college student practicing experiment while standing in lab
    High school students with hands raised in debate class — Stock Photo
    High school students with hands raised in debate class
    High angle view of female student studying at desk in classroom — Stock Photo
    High angle view of female student studying at desk in classroom
    Portrait confident high school boy student in classroom — Stock Photo
    Portrait confident high school boy student in classroom
    Girl students using microscope, conducting scientific experiment in laboratory classroom — Stock Photo
    Girl students using microscope, conducting scientific experiment in laboratory classroom
    Focused students using computer in dark classroom — Stock Photo
    Focused students using computer in dark classroom
    Front view of a teenage Caucasian boy in a high school classroom sitting at desk, raising his hand to answer a question, with teenage male classmates sitting at desks working in the background — Stock Photo
    Front view of a teenage Caucasian boy in a high school classroom sitting at desk, raising his hand to answer a question, with teenage male classmates sitting at desks working in the background
    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
    Girl student programming and assembling robotics in classroom — Stock Photo
    Girl student programming and assembling robotics in classroom
    Male student showing tablet computer to friend while standing in lab — Stock Photo
    Male student showing tablet computer to friend while standing in lab
    Girl students using microscope, conducting scientific experiment in laboratory classroom — Stock Photo
    Girl students using microscope, conducting scientific experiment in laboratory classroom
    Smiling female students studying at desk in classroom — Stock Photo
    Smiling female students studying at desk in classroom
    Girl student examining and touching molecular structure in classroom — Stock Photo
    Girl student examining and touching molecular structure in classroom
    High school students clapping in debate class — Stock Photo
    High school students clapping in debate class
    Front view of a teenage Caucasian girl in a school classroom sitting at desk, concentrating and writing, with teenage male and female classmates sitting at desks working in the background — Stock Photo
    Front view of a teenage Caucasian girl in a school classroom sitting at desk, concentrating and writing, with teenage male and female classmates sitting at desks working in the background
    Schoolkids using globe in classroom at school — Stock Photo
    Schoolkids using globe in classroom at school
    Male teacher teaching students in the class at school — Stock Photo
    Male teacher teaching students in the class at school
    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
    Portrait smiling, confident junior high school girl studying in classroom — Stock Photo
    Portrait smiling, confident junior high school girl studying in classroom