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    Girl students using microscope, conducting scientific experiment in laboratory classroom — Stock Photo
    Girl students using microscope, conducting scientific experiment in laboratory classroom
    High school students clapping for classmate in debate class — Stock Photo
    High school students clapping for classmate in debate class
    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 group of female Caucasian field hockey players, preparing before a game, standing in a row embracing with hands on their teammates shoulders, on a sunny day — Stock Photo
    Rear view of a group of female Caucasian field hockey players, preparing before a game, standing in a row embracing with hands on their teammates shoulders, on a sunny day
    Side view of a teenage Caucasian girl in a school classroom sitting at her desk with her head on her arms, sleeping, 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 her desk with her head on her arms, sleeping, with teenage male and female classmates sitting at desks working in the background
    Portrait of playful junior high girl student wearing virtual reality glasses — Stock Photo
    Portrait of playful junior high girl student wearing virtual reality glasses
    Side view of a Caucasian male field hockey coach interacting with a multi-ethnic group of female field hockey players, sitting in a changing room, showing them a game plan — Stock Photo
    Side view of a Caucasian male field hockey coach interacting with a multi-ethnic group of female field hockey players, sitting in a changing room, showing them a game plan
    Young college students studying at desk in calssroom — Stock Photo
    Young college students studying at desk in calssroom
    High school students talking at table in debate class — Stock Photo
    High school students talking at table in debate class
    Students conducting scientific experiment in laboratory classroom — Stock Photo
    Students conducting scientific experiment in laboratory classroom
    High school girls talking on stair landing — Stock Photo
    High school girls talking on stair landing
    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
    Schoolboy explaining about world map in classroom at school — Stock Photo
    Schoolboy explaining about world map in classroom at school
    Female teacher and junior high school students studying at desk in classroom — Stock Photo
    Female teacher and junior high school students studying at desk in classroom
    Male teacher teaching students in the class at school — Stock Photo
    Male teacher teaching students in the class at school
    Junior high school students using virtual reality simulators in classroom — Stock Photo
    Junior high school students using virtual reality simulators in classroom
    High angle view of a Caucasian teenage boy playing a trombone during a school band practice, with a Caucasian teenage girl and other teenage musicians sitting in the background — Stock Photo
    High angle view of a Caucasian teenage boy playing a trombone during a school band practice, with a Caucasian teenage girl and other teenage musicians sitting in the background
    Portrait confident junior high girl student with braces — Stock Photo
    Portrait confident junior high girl student with braces
    Overhead view of a teenage Caucasian girl in a school classroom sitting at desk, concentrating and using a laptop computer — Stock Photo
    Overhead view of a teenage Caucasian girl in a school classroom sitting at desk, concentrating and using a laptop computer
    Female college students studying at desk in classroom — Stock Photo
    Female college students studying at desk in classroom
    Digital molecular model of secondary structure of immunoglobulin G antibody. — Stock Photo
    Digital molecular model of secondary structure of immunoglobulin G antibody.
    Schoolboy writing on chalkboard in classroom at school — Stock Photo
    Schoolboy writing on chalkboard in classroom at school
    Girl students assembling robotics in classroom — Stock Photo
    Girl students assembling robotics in classroom
    Side view of a multi-ethnic group of teenage male field hockey players training before a game, working out in a row, doing push ups on a hockey pitch on a sunny day — Stock Photo
    Side view of a multi-ethnic group of teenage male field hockey players training before a game, working out in a row, doing push ups on a hockey pitch on a sunny day
    Curious girl students conducting scientific experiment in laboratory classroom — Stock Photo
    Curious girl students conducting scientific experiment in laboratory classroom
    Happy female teacher talking with colleague — Stock Photo
    Happy female teacher talking with colleague
    Teenage girl practicing chemistry experiment in lab — Stock Photo
    Teenage girl practicing chemistry experiment in lab
    Side view of a multi-ethnic group of high school teenage male and female school pupils in a classroom, sitting at a table working together — Stock Photo
    Side view of a multi-ethnic group of high school teenage male and female school pupils in a classroom, sitting at a table working together
    Side view of a Caucasian teenage boy standing on stage holding a script in an empty school theatre during rehearsals for a performance — Stock Photo
    Side view of a Caucasian teenage boy standing on stage holding a script in an empty school theatre during rehearsals for a performance
    Side view of a Caucasian male field hockey coach interacting with a group of female Caucasian field hockey players, sitting in a changing room, showing them a game plan — 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, showing them a game plan
    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
    Female university student using digital tablet while studying at desk in classroom — Stock Photo
    Female university student using digital tablet while studying at desk in classroom
    Digital molecular model of secondary structure of immunoglobulin G antibodies. — Stock Photo
    Digital molecular model of secondary structure of immunoglobulin G antibodies.
    France, Normandy, Montmartin-sur Mer, Haystacks mechanically rolled at the time of harvest. — Stock Photo
    France, Normandy, Montmartin-sur Mer, Haystacks mechanically rolled at the time of harvest.
    Portrait of two cheerful female students sitting on steps with arms around — Stock Photo
    Portrait of two cheerful female students sitting on steps with arms around
    Portrait of smiling, confident junior high school girl in classroom — Stock Photo
    Portrait of smiling, confident junior high school girl in classroom
    Junior high girl students walking in library — Stock Photo
    Junior high girl students walking in library
    High angle view of teenage girl practicing experiment in lab — Stock Photo
    High angle view of teenage girl practicing experiment in lab
    Side view of a Caucasian teenage boy in an empty high school theatre, sitting on steps of the front of the stage, preparing for a performance, holding a script and learning lines — Stock Photo
    Side view of a Caucasian teenage boy in an empty high school theatre, sitting on steps of the front of the stage, preparing for a performance, holding a script and learning lines
    Smiling, eager girl student asking a question in classroom — Stock Photo
    Smiling, eager girl student asking a question in classroom
    Side view of a group of female Caucasian field hockey players preparing before a game, sitting on a stand, holding hockey sticks, with their Caucasian male field hockey coach standing in front of them, talking about game plan on a sunny day — Stock Photo
    Side view of a group of female Caucasian field hockey players preparing before a game, sitting on a stand, holding hockey sticks, with their Caucasian male field hockey coach standing in front of them, talking about game plan on a sunny day
    Students writing their GCSE exam in classroom — Stock Photo
    Students writing their GCSE exam in classroom
    Front view of a multi-ethnic group of 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 male field hockey players, training before a game, working out on a field hockey pitch, running on a sunny day
    Focused boy student assembling electronics in classroom — Stock Photo
    Focused boy student assembling electronics in classroom
    Confident junior high school girl student doing homework in classroom — Stock Photo
    Confident junior high school girl student doing homework in classroom
    High school students clapping in debate class — Stock Photo
    High school students clapping in debate class
    Focused junior high school student using highlighter, doing homework in classroom — Stock Photo
    Focused junior high school student using highlighter, doing homework in classroom
    Rear view of a Caucasian female field hockey player, during a field hockey game, running with a ball, holding a hockey stick, with her teammates and opponents in the foreground, on a sunny day — Stock Photo
    Rear view of a Caucasian female field hockey player, during a field hockey game, running with a ball, holding a hockey stick, with her teammates and opponents in the foreground, on a sunny day
    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
    Portrait of a teenage mixed race male field hockey player, wearing a red team strip, standing on a field hockey pitch, looking to camera, focusing before a game, with his teammates in the background on a sunny day — Stock Photo
    Portrait of a teenage mixed race male field hockey player, wearing a red team strip, standing on a field hockey pitch, looking to camera, focusing before a game, with his teammates in the background on a sunny day
    Side view of an empty classroom, with desks in formation and blackboard behind them, with open windows in sunny day — Stock Photo
    Side view of an empty classroom, with desks in formation and blackboard behind them, with open windows in sunny day
    Side view of a group of female Caucasian field hockey players and their Caucasian male coach training before a game, standing on a stand, resting, listening to their coach, on a sunny day — Stock Photo
    Side view of a group of female Caucasian field hockey players and their Caucasian male coach training before a game, standing on a stand, resting, listening to their coach, on a sunny day
    Side view of a Caucasian musician teenage girl sitting by a window playing a ukulele alone in a high school — Stock Photo
    Side view of a Caucasian musician teenage girl sitting by a window playing a ukulele alone in a high school
    Side view close up of a Caucasian female field hockey players, preparing before a game, standing in a changing room, wearing a hockey helmet, with her teammates standing in a row behind her — Stock Photo
    Side view close up of a Caucasian female field hockey players, preparing before a game, standing in a changing room, wearing a hockey helmet, with her teammates standing in a row behind her
    High angle side view of a Caucasian male teacher sitting in a classroom conducting a multi-ethnic group of teenage male and female musicians at a school band practice — Stock Photo
    High angle side view of a Caucasian male teacher sitting in a classroom conducting a multi-ethnic group of teenage male and female musicians at 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
    Digital illustration of solid node in right lung near lung apex while secondary tuberculosis infection. — Stock Photo
    Digital illustration of solid node in right lung near lung apex while secondary tuberculosis infection.
    Mid section of teenage girl practicing at desk in classroom — Stock Photo
    Mid section of teenage girl practicing at desk in classroom
    College students writing on book while sitting at desks during exam in classroom — Stock Photo
    College students writing on book while sitting at desks during exam in classroom
    Teenage female student looking at laptop while studying at desk in classroom — Stock Photo
    Teenage female student looking at laptop while studying at desk in classroom