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    Teacher and students in adult education carpentry workshop class — Stock Photo
    Teacher and students in adult education carpentry workshop class
    Male anatomy showing Brachioradialis muscle, computer illustration. — Stock Photo
    Male anatomy showing Brachioradialis muscle, computer illustration.
    Illustration of human lungs in body silhouette. — Stock Photo
    Illustration of human lungs in body silhouette.
    Model virus particles kit, illustration. — Stock Photo
    Model virus particles kit, illustration.
    Schoolchildren sitting in classroom — Stock Photo
    Schoolchildren sitting in classroom
    Boys learning in classroom — Stock Photo
    Boys learning in classroom
    Children playing in an inner courtyard and painting with water paints — Stock Photo
    Children playing in an inner courtyard and painting with water paints
    Side view of schoolgirl playing piano in music school — Stock Photo
    Side view of schoolgirl playing piano in music school
    University students performing experiment in lab — Stock Photo
    University students performing experiment in lab
    Young college students studying together — Stock Photo
    Young college students studying together
    Portrait of multi ethnic group of happy conservation volunteers cleaning up river in the countryside with board Our Earth and bags with rubbish. Ecology and social responsibility in rural environment. — Stock Photo
    Portrait of multi ethnic group of happy conservation volunteers cleaning up river in the countryside with board Our Earth and bags with rubbish. Ecology and social responsibility in rural environment.
    Daughter reading book — Stock Photo
    Daughter reading book
    Illustration of human kidneys in body silhouette. — Stock Photo
    Illustration of human kidneys in body silhouette.
    A modern building, nursery or pre-school, a large sand pit play area with a slide. — Stock Photo
    A modern building, nursery or pre-school, a large sand pit play area with a slide.
    Bending female silhouette with knee pain, digital illustration. — Stock Photo
    Bending female silhouette with knee pain, digital illustration.
    Junior high students using computers in computer lab — Stock Photo
    Junior high students using computers in computer lab
    Chinese schoolchildren using smartphone in school yard — Stock Photo
    Chinese schoolchildren using smartphone in school yard
    Man and a girl in a field of flowers. — Stock Photo
    Man and a girl in a field of flowers.
    Metatarsal bones in x-ray computer illustration of human foot. — Stock Photo
    Metatarsal bones in x-ray computer illustration of human foot.
    Woman reading file while practicing experiment in lab — Stock Photo
    Woman reading file while practicing experiment in lab
    Portrait smiling, confident girl student researching at computer in library — Stock Photo
    Portrait smiling, confident girl student researching at computer in library
    Happy young woman playing violin at home — Stock Photo
    Happy young woman playing violin at home
    Blue human silhouette with visible brain on black background, digital illustration. — Stock Photo
    Blue human silhouette with visible brain on black background, digital illustration.
    Boy with toy in classroom — Stock Photo
    Boy with toy in classroom
    Portrait of smiling schoolgirls — Stock Photo
    Portrait of smiling schoolgirls
    Side view of a Caucasian teenage girl in an empty high school theatre preparing before a performance, standing on the stage, holding a script and practicing her part — Stock Photo
    Side view of a Caucasian teenage girl in an empty high school theatre preparing before a performance, standing on the stage, holding a script and practicing her part
    School in Grashoek village — Stock Photo
    School in Grashoek village
    Visible skeleton in female body silhouette on white background, computer illustration. — Stock Photo
    Visible skeleton in female body silhouette on white background, computer illustration.
    Low section of conservation volunteer cleaning up river in the countryside, carrying bag full of rubbish. Ecology and social responsibility in rural environment. — Stock Photo
    Low section of conservation volunteer cleaning up river in the countryside, carrying bag full of rubbish. Ecology and social responsibility in rural environment.
    Smiling girl holding book — Stock Photo
    Smiling girl holding book
    Cheerful female freelancer with netbook in red case standing in city street and looking forward — Stock Photo
    Cheerful female freelancer with netbook in red case standing in city street and looking forward
    Girl sat in a beautiful back yard picking flowers looking thoughtful — Stock Photo
    Girl sat in a beautiful back yard picking flowers looking thoughtful
    Girl studying with her father at home — Stock Photo
    Girl studying with her father at home
    Young man and woman with bicycle laughing on city street — Stock Photo
    Young man and woman with bicycle laughing on city street
    Young couple college students using cell phone and digital tablet at kitchen table — Stock Photo
    Young couple college students using cell phone and digital tablet at kitchen table
    Female musculature in transparent silhouette, digital illustration. — Stock Photo
    Female musculature in transparent silhouette, digital illustration.
    Male nervous system in body silhouette, computer illustration. — Stock Photo
    Male nervous system in body silhouette, computer illustration.
    Playful couple enjoying cooking class in kitchen — Stock Photo
    Playful couple enjoying cooking class in kitchen
    Happy chinese rural female teacher and pupils in classroom — Stock Photo
    Happy chinese rural female teacher and pupils in classroom
    Teenage girl with friends — Stock Photo
    Teenage girl with friends
    Thoughtful schoolboy in casual wear and wireless headphones enjoying music and drawing with pencils while spending free time in bedroom — Stock Photo
    Thoughtful schoolboy in casual wear and wireless headphones enjoying music and drawing with pencils while spending free time in bedroom
    Children with a small animals — Stock Photo
    Children with a small animals
    Colored lungs in transparent female body on black background, computer illustration. — Stock Photo
    Colored lungs in transparent female body on black background, computer illustration.
    Curious students examining liquid in beaker, conducting scientific experiment in laboratory classroom — Stock Photo
    Curious students examining liquid in beaker, conducting scientific experiment in laboratory classroom
    Portrait of happy boy drawing in paper while parents using laptop in background — Stock Photo
    Portrait of happy boy drawing in paper while parents using laptop in background
    Teenagers with video camera and microphone vlogging — Stock Photo
    Teenagers with video camera and microphone vlogging
    Side view of concentrated man with backpack studying at laptop and writing on a notepad sitting in park grass with crossed legs in sunny day — Stock Photo
    Side view of concentrated man with backpack studying at laptop and writing on a notepad sitting in park grass with crossed legs in sunny day
    Doctor and residents examining patient in hospital bed — Stock Photo
    Doctor and residents examining patient in hospital bed
    Illustration of stomach in human body silhouette. — Stock Photo
    Illustration of stomach in human body silhouette.
    Bearded man sitting on floor and using laptop at home — Stock Photo
    Bearded man sitting on floor and using laptop at home
    Medical illustration of human blood vessels of head. — Stock Photo
    Medical illustration of human blood vessels of head.
    Front view close up of a group of young African schoolchildren writing in their notebooks during a lesson in a township elementary school classroom — Stock Photo
    Front view close up of a group of young African schoolchildren writing in their notebooks during a lesson in a township elementary school classroom
    Distal phalanx bones in x-ray computer illustration of human foot. — Stock Photo
    Distal phalanx bones in x-ray computer illustration of human foot.
    Girl looking at laptop — Stock Photo
    Girl looking at laptop
    African American female specialist with dreadlocks adjusting and turning on lamp of binocular glasses while working in contemporary laboratory — Stock Photo
    African American female specialist with dreadlocks adjusting and turning on lamp of binocular glasses while working in contemporary laboratory
    Light micrograph of onion (Allium cepa) root tip cells undergoing mitosis (nuclear division). — Stock Photo
    Light micrograph of onion (Allium cepa) root tip cells undergoing mitosis (nuclear division).
    Morning assembly of school students — Stock Photo
    Morning assembly of school students
    Grandfather and grandson playing chess in the garden — Stock Photo
    Grandfather and grandson playing chess in the garden
    Beautiful young woman reading book at home — Stock Photo
    Beautiful young woman reading book at home
    Teacher and Young Students — Stock Photo
    Teacher and Young Students