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    Portrait of a confident Caucasian female field hockey player, preparing before a game, looking at camera with her teammates standing in a row in the background on a sunny day — Stock Photo
    Portrait of a confident Caucasian female field hockey player, preparing before a game, looking at camera with her teammates standing in a row in the background on a sunny day
    Junior high boy students walking in library — Stock Photo
    Junior high boy students walking in library
    Happy high school students clapping in debate class — Stock Photo
    Happy high school students clapping in debate class
    Junior high students talking — Stock Photo
    Junior high students talking
    Front view of a multi-ethnic group of teenage pupils standing together in a classroom and smiling to camera at break time — Stock Photo
    Front view of a multi-ethnic group of teenage pupils standing together in a classroom and smiling to camera at break time
    Surprised, curious students watching chemical reaction, conducting scientific experiment in laboratory classroom — Stock Photo
    Surprised, curious students watching chemical reaction, conducting scientific experiment in laboratory classroom
    Teenage girl using tablet while standing in lab — Stock Photo
    Teenage girl using tablet while standing in lab
    Junior high students using computers in computer lab — Stock Photo
    Junior high students using computers in computer lab
    Portrait confident, smiling female teacher and girl students researching at computer in library — Stock Photo
    Portrait confident, smiling female teacher and girl students researching at computer in library
    Front view of a multi-ethnic group of teenage male and female high school students with schoolbags hanging out, standing and hand stacking in their school grounds — Stock Photo
    Front view of a multi-ethnic group of teenage male and female high school students with schoolbags hanging out, standing and hand stacking in their school grounds
    Front view close up of a Caucasian musician teenage boy sitting and playing an acoustic guitar in a high school — Stock Photo
    Front view close up of a Caucasian musician teenage boy sitting and playing an acoustic guitar in a high school
    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
    Female science teacher and girl student writing at whiteboard in classroom — Stock Photo
    Female science teacher and girl student writing at whiteboard in classroom
    Low angle side view of a multi-ethnic group of teenage male field hockey players training before a game with their Caucasian male field hockey coach, working out on a field hockey pitch, doing sit ups in a circle on a sunny day — Stock Photo
    Low angle side view of a multi-ethnic group of teenage male field hockey players training before a game with their Caucasian male field hockey coach, working out on a field hockey pitch, doing sit ups in a circle on a sunny day
    Smiling female science teacher and girl student reading textbook at microscope in laboratory classroom — Stock Photo
    Smiling female science teacher and girl student reading textbook at microscope in laboratory classroom
    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
    Junior high students talking in library — Stock Photo
    Junior high students talking in library
    High angle view of a multi-ethnic group of teenage school pupils sitting and standing around a table in a classroom using laptop and tablet computers together at break time looking up to camera and smiling — Stock Photo
    High angle view of a multi-ethnic group of teenage school pupils sitting and standing around a table in a classroom using laptop and tablet computers together at break time looking up to camera and smiling
    Junior high students leaving school building, descending steps — Stock Photo
    Junior high students leaving school building, descending steps
    France, drawer with numerous compartments containing lead letters used for old printing — Stock Photo
    France, drawer with numerous compartments containing lead letters used for old printing
    Junior high school boy opening notebook at desk in classroom — Stock Photo
    Junior high school boy opening notebook at desk in classroom
    Happy female teacher talking with colleague — Stock Photo
    Happy female teacher talking with colleague
    Smiling female science teacher leading lesson at whiteboard in classroom — Stock Photo
    Smiling female science teacher leading lesson at whiteboard in classroom
    Schoolkids studying in the classroom at school — Stock Photo
    Schoolkids studying in the classroom at school
    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, with their coach in the foreground, 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, with their coach in the foreground, on a sunny day
    High school students talking at table in debate class — Stock Photo
    High school students talking at table in debate class
    Happy, laughing junior high school students in classroom — Stock Photo
    Happy, laughing junior high school students in classroom
    Portrait of smiling, confident junior high student using computer in computer lab — Stock Photo
    Portrait of smiling, confident junior high student using computer in computer lab
    Side view of a Caucasian high school teenage girl in an empty high school theatre preparing before a performance, standing on the stage with arms in the air, holding a script and practicing her part — Stock Photo
    Side view of a Caucasian high school teenage girl in an empty high school theatre preparing before a performance, standing on the stage with arms in the air, holding a script and practicing her part
    Side view close up of a Caucasian sad teenage girl sitting on the ground alone in a schoolyard in a high school — Stock Photo
    Side view close up of a Caucasian sad teenage girl sitting on the ground alone in a schoolyard in a high school
    Junior high school students using virtual reality simulators in dark classroom — Stock Photo
    Junior high school students using virtual reality simulators in dark classroom
    College students discussing while studying at desk in classroom — Stock Photo
    College students discussing while studying at desk in classroom
    Teacher and students in classroom during lesson — Stock Photo
    Teacher and students in classroom during lesson
    Smiling female science teacher leading lesson at projection screen in classroom — Stock Photo
    Smiling female science teacher leading lesson at projection screen in classroom
    Focused boy student assembling electronics in classroom — Stock Photo
    Focused boy student assembling electronics in classroom
    Rear view of a Caucasian woman conductor directing a multi-ethnic group of teenage male and female choristers holding sheet music and singing standing on the stage of a school theatre during rehearsals for a performance — Stock Photo
    Rear view of a Caucasian woman conductor directing a multi-ethnic group of teenage male and female choristers holding sheet music and singing standing on the stage of a school theatre during rehearsals for a performance
    Portrait of confident, smiling junior high student — Stock Photo
    Portrait of confident, smiling junior high student
    Female university student studying at desk in classroom — Stock Photo
    Female university student studying at desk in classroom
    Side view of college students studying at desk in classroom — Stock Photo
    Side view of college students studying at desk in classroom
    Teenage girl being interviewed for vlog — Stock Photo
    Teenage girl being interviewed for vlog
    Male teacher leading lesson at touch screen in classroom — Stock Photo
    Male teacher leading lesson at touch screen in classroom
    Portrait smiling, confident girl student programming at computer in classroom — Stock Photo
    Portrait smiling, confident girl student programming at computer in classroom
    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
    Young college students practicing experiment in lab — Stock Photo
    Young college students practicing experiment in lab
    Side view of a teenage Caucasian girl in a school classroom sitting at desk, concentrating, with teenage male and female classmates sitting at desks working in the background — Stock Photo
    Side view of a teenage Caucasian girl in a school classroom sitting at desk, concentrating, with teenage male and female classmates sitting at desks working in the background
    Side view of a group of happy female Caucasian field hockey players, preparing before a game, standing in a row embracing with hands on their teammates shoulders, smiling on a sunny day — Stock Photo
    Side view of a group of happy female Caucasian field hockey players, preparing before a game, standing in a row embracing with hands on their teammates shoulders, smiling on a sunny day
    Boy playing table tennis — Stock Photo
    Boy playing table tennis
    Broom stem. Light micrograph (LM) of transverse section through stem of common broom (Salicornia europaea) plant. Broom is drought plant (xerophyte) with ribbed stems and branches to increase area for photosynthesis — Stock Photo
    Broom stem. Light micrograph (LM) of transverse section through stem of common broom (Salicornia europaea) plant. Broom is drought plant (xerophyte) with ribbed stems and branches to increase area for photosynthesis
    Rear view of a multi-ethnic group of teenage male field hockey players and a Caucasian male field hockey coach, motivating before a game, high fiving in a huddle, interacting on the pitch on a sunny day — Stock Photo
    Rear view of a multi-ethnic group of teenage male field hockey players and a Caucasian male field hockey coach, motivating before a game, high fiving in a huddle, interacting on the pitch on a sunny day
    Teenage girls designing denim jacket in fashion design class — Stock Photo
    Teenage girls designing denim jacket in fashion design class
    Side view of a multi-ethnic group of teenage pupils sitting at desks in class studying at school with a Caucasian male teacher standing and talking to one Caucasian girl at her desk — Stock Photo
    Side view of a multi-ethnic group of teenage pupils sitting at desks in class studying at school with a Caucasian male teacher standing and talking to one Caucasian girl at her desk
    Happy, confident high school girl student studying in classroom — Stock Photo
    Happy, confident high school girl student studying in classroom
    Bridal high-heeled shoes with flowers — Stock Photo
    Bridal high-heeled shoes with flowers
    Curious girl student holding molecule model in classroom — Stock Photo
    Curious girl student holding molecule model in classroom
    Side view of a teenage Caucasian boy 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
    Side view of a teenage Caucasian boy in a school classroom sitting at desk, concentrating and writing, with teenage male and female classmates sitting at desks working in the background
    Schoolkids standing in school campus on a sunny day — Stock Photo
    Schoolkids standing in school campus on a sunny day
    Man assisting female friend while studying at desk in classroom — Stock Photo
    Man assisting female friend while studying at desk in classroom
    Portrait confident junior high school students in classroom — Stock Photo
    Portrait confident junior high school students in classroom
    Side view of a teenage Caucasian boy and a teenage African American girl in a high school classroom sitting at desks, working together and reading, with teenage classmates sitting at desks working in the background — Stock Photo
    Side view of a teenage Caucasian boy and a teenage African American girl in a high school classroom sitting at desks, working together and reading, with teenage classmates sitting at desks working in the background