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    Smiling students clapping in aerobics class — Stock Photo
    Smiling students clapping in aerobics class
    Human organs in container on desk — Stock Photo
    Human organs in container on desk
    Confident young multiethnic female friends enjoying pastime in street — Stock Photo
    Confident young multiethnic female friends enjoying pastime in street
    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
    Couple studying on the terrace of a bar in Barcelona — Stock Photo
    Couple studying on the terrace of a bar in Barcelona
    Female scientist using microscope in laboratory — Stock Photo
    Female scientist using microscope in laboratory
    Female friends entering university — Stock Photo
    Female friends entering university
    Side view close up of a young African schoolboy sitting at his desk and turning around, looking to camera during a lesson in a township elementary school classroom. — Stock Photo
    Side view close up of a young African schoolboy sitting at his desk and turning around, looking to camera during a lesson in a township elementary school classroom.
    Schoolchildren in school uniform discussing test results at school yard — Stock Photo
    Schoolchildren in school uniform discussing test results at school yard
    College student raising hand in computer lab classroom — Stock Photo
    College student raising hand in computer lab classroom
    Cheerful young diverse female friends celebrating meeting in city — Stock Photo
    Cheerful young diverse female friends celebrating meeting in city
    Junior high students talking at stairs — Stock Photo
    Junior high students talking at stairs
    Students examining condenser coil on refrigeration unit in HVAC classroom — Stock Photo
    Students examining condenser coil on refrigeration unit in HVAC classroom
    Elevated side view close up of a young African schoolgirl and two schoolboys sitting at a desks listening during a lesson in a township elementary school classroom — Stock Photo
    Elevated side view close up of a young African schoolgirl and two schoolboys sitting at a desks listening during a lesson in a township elementary school classroom
    Portrait of happy school students — Stock Photo
    Portrait of happy school students
    Two teenage boys with skateboard and backpack shaking hands and laughing on the street — Stock Photo
    Two teenage boys with skateboard and backpack shaking hands and laughing on the street
    Students sitting in classroom — Stock Photo
    Students sitting in classroom
    High angle front 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 front 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
    College students studying at laptop in classroom — Stock Photo
    College students studying at laptop in classroom
    Front view of a multi-ethnic group of high school teenage male and female school pupils in a classroom, sitting at a table working together, looking at a laptop computer — Stock Photo
    Front view of a multi-ethnic group of high school teenage male and female school pupils in a classroom, sitting at a table working together, looking at a laptop computer
    Students studying in adult education classroom — Stock Photo
    Students studying in adult education classroom
    Kids wave to teachers during car parade in local neighborhood — Stock Photo
    Kids wave to teachers during car parade in local neighborhood
    Confident young multiethnic female friends enjoying pastime in street — Stock Photo
    Confident young multiethnic female friends enjoying pastime in street
    Caucasian female chef cutting onion, with other chefs cutting and cooking in the background. Cookery class at a restaurant kitchen. — Stock Photo
    Caucasian female chef cutting onion, with other chefs cutting and cooking in the background. Cookery class at a restaurant kitchen.
    Portrait of a beautiful Asian girl on a day at the beach with her friends, the sun behind her — Stock Photo
    Portrait of a beautiful Asian girl on a day at the beach with her friends, the sun behind her
    Girl looking at female friend — Stock Photo
    Girl looking at female friend
    Careless youthful diverse women in casual clothes having fun together on stadium — Stock Photo
    Careless youthful diverse women in casual clothes having fun together on stadium
    Young friends reading book — Stock Photo
    Young friends reading book
    Young hipster multiracial couple outdoor — Stock Photo
    Young hipster multiracial couple outdoor
    High school teacher helping students with homework in classroom — Stock Photo
    High school teacher helping students with homework in classroom
    Back view of Affectionate young friends with backpacks hugging — Stock Photo
    Back view of Affectionate young friends with backpacks hugging
    Confident young multiethnic female friends enjoying pastime in street — Stock Photo
    Confident young multiethnic female friends enjoying pastime in street
    Young male and female researchers holding dropper and test tube in laboratory. — Stock Photo
    Young male and female researchers holding dropper and test tube in laboratory.
    Smiling young couple laying in bed using laptop — Stock Photo
    Smiling young couple laying in bed using laptop
    View from above high school teacher supervising students taking exam — Stock Photo
    View from above high school teacher supervising students taking exam
    Smiling girl students examining liquid in test tube, conducting scientific experiment in laboratory classroom — Stock Photo
    Smiling girl students examining liquid in test tube, conducting scientific experiment in laboratory classroom
    Young students with Down Syndrome baking muffins in kitchen — Stock Photo
    Young students with Down Syndrome baking muffins in kitchen
    College students studying in classroom — Stock Photo
    College students studying in classroom
    Young male researcher looking at sample under microscope in laboratory. — Stock Photo
    Young male researcher looking at sample under microscope in laboratory.
    College students looking at tablet computer while studying at desk in library — Stock Photo
    College students looking at tablet computer while studying at desk in library
    Smiling students at computer in adult education classroom — Stock Photo
    Smiling students at computer in adult education classroom
    Portrait confident junior high school students in classroom — Stock Photo
    Portrait confident junior high school students in classroom
    Diverse group of students studying while siting on their desk in class at elementary school. school and education concept — Stock Photo
    Diverse group of students studying while siting on their desk in class at elementary school. school and education concept
    Students conducting scientific experiment in laboratory classroom — Stock Photo
    Students conducting scientific experiment in laboratory classroom
    Plastic human head to study dental anatomy — Stock Photo
    Plastic human head to study dental anatomy
    Medical students practicing inserting intravenous line on training dummy. — Stock Photo
    Medical students practicing inserting intravenous line on training dummy.
    Junior high school girl student using computer in classroom — Stock Photo
    Junior high school girl student using computer in classroom
    Girl students using microscope, conducting scientific experiment in laboratory classroom — Stock Photo
    Girl students using microscope, conducting scientific experiment in laboratory classroom
    Male and female pilot training about electric car to students in training institute — Stock Photo
    Male and female pilot training about electric car to students in training institute
    Caucasian male student smiling in class — Stock Photo
    Caucasian male student smiling in class
    College students study group indoors — Stock Photo
    College students study group indoors
    Junior high students talking in library — Stock Photo
    Junior high students talking in library
    University students studying in library — Stock Photo
    University students studying in library
    Young couples roommates using laptop surrounded by moving boxes — Stock Photo
    Young couples roommates using laptop surrounded by moving boxes
    Students using laptop together — Stock Photo
    Students using laptop together
    Curious students conducting scientific experiment, examining liquid in beaker in laboratory classroom — Stock Photo
    Curious students conducting scientific experiment, examining liquid in beaker in laboratory classroom
    Students taking notes and watching chef teacher at oven in cooking class kitchen — Stock Photo
    Students taking notes and watching chef teacher at oven in cooking class kitchen
    Chinese couple using laptop in cafe — Stock Photo
    Chinese couple using laptop in cafe
    University students doing experiment on microscope in laboratory at college — Stock Photo
    University students doing experiment on microscope in laboratory at college
    Community college instructor helping students with paperwork in classroom — Stock Photo
    Community college instructor helping students with paperwork in classroom