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    Portrait of confident, smiling junior high student — Stock Photo
    Portrait of confident, smiling junior high student
    Teacher looking at works of children — Stock Photo
    Teacher looking at works of children
    Ten year-old bi-racial girl doing homework at table — Stock Photo
    Ten year-old bi-racial girl doing homework at table
    Young woman texting with cell phone — Stock Photo
    Young woman texting with cell phone
    Woman using copy machine in library — Stock Photo
    Woman using copy machine in library
    Little kid standing at blackboard in classroom — Stock Photo
    Little kid standing at blackboard in classroom
    Multiethnic male and female friends — Stock Photo
    Multiethnic male and female friends
    Male teacher and girl students conducting scientific experiment at microscope in laboratory classroom — Stock Photo
    Male teacher and girl students conducting scientific experiment at microscope in laboratory classroom
    Abstract male silhouette with visible lumbar spine, computer illustration. — Stock Photo
    Abstract male silhouette with visible lumbar spine, computer illustration.
    Asian girl reading and doing homework at her home — Stock Photo
    Asian girl reading and doing homework at her home
    Student showing off finger painting in classroom — Stock Photo
    Student showing off finger painting in classroom
    Boy writing in book — Stock Photo
    Boy writing in book
    Side view of little talented girl drawing painting sitting at easel against window at home — Stock Photo
    Side view of little talented girl drawing painting sitting at easel against window at home
    Portrait of a young girl standing by a window holding the curtain — Stock Photo
    Portrait of a young girl standing by a window holding the curtain
    Young women in hijabs talking outside sunny building — Stock Photo
    Young women in hijabs talking outside sunny building
    Buddhist monk reading Novice learning sitting on log outdoors, Thailand — Stock Photo
    Buddhist monk reading Novice learning sitting on log outdoors, Thailand
    Portrait enthusiastic female high school student in corridor — Stock Photo
    Portrait enthusiastic female high school student in corridor
    High angle mid section of musician teenage girl wearing a striped sweater sitting and playing a ukulele alone — Stock Photo
    High angle mid section of musician teenage girl wearing a striped sweater sitting and playing a ukulele alone
    Human silhouette with selected liver, illustration. — Stock Photo
    Human silhouette with selected liver, illustration.
    Illustration of hip joint in human skeleton on black background. — Stock Photo
    Illustration of hip joint in human skeleton on black background.
    Abstract male silhouette with visible thoracic spine, computer illustration. — Stock Photo
    Abstract male silhouette with visible thoracic spine, computer illustration.
    Teacher talking to children — Stock Photo
    Teacher talking to children
    Light microscope objective lenses in laboratory. — Stock Photo
    Light microscope objective lenses in laboratory.
    Young little asian toddler girl playing with educational toys — Stock Photo
    Young little asian toddler girl playing with educational toys
    Low angle view of library with sign — Stock Photo
    Low angle view of library with sign
    Female artists working in art studio — Stock Photo
    Female artists working in art studio
    Full body cheerful little jockey carrying training balls and looking at camera while walking on dressage arena in equestrian school — Stock Photo
    Full body cheerful little jockey carrying training balls and looking at camera while walking on dressage arena in equestrian school
    Blue silhouette of senior woman silhouette with highlighted thyroid gland, illustration. — Stock Photo
    Blue silhouette of senior woman silhouette with highlighted thyroid gland, illustration.
    Woman turning the page of a book. — Stock Photo
    Woman turning the page of a book.
    Chef and students with Down Syndrome baking bread in kitchen — Stock Photo
    Chef and students with Down Syndrome baking bread in kitchen
    3d illustration of cross-section showing structure of Earth, from core to atmosphere. — Stock Photo
    3d illustration of cross-section showing structure of Earth, from core to atmosphere.
    Bones of human hand, x-ray computer illustration. — Stock Photo
    Bones of human hand, x-ray computer illustration.
    Female college student showing tablet computer to classmate while standing in library — Stock Photo
    Female college student showing tablet computer to classmate while standing in library
    Portrait of boy sitting in classroom — Stock Photo
    Portrait of boy sitting in classroom
    Human brain haemorrhage, digital illustration. — Stock Photo
    Human brain haemorrhage, digital illustration.
    Schoolkids studying in the classroom at school — Stock Photo
    Schoolkids studying in the classroom at school
    Portrait smiling chef teacher and students in cooking class kitchen — Stock Photo
    Portrait smiling chef teacher and students in cooking class kitchen
    Illustration of fatty heart on white background. — Stock Photo
    Illustration of fatty heart on white background.
    Focused young male student with Down Syndrome baking bread — Stock Photo
    Focused young male student with Down Syndrome baking bread
    Scientists examining skull in lab — Stock Photo
    Scientists examining skull in lab
    Chinese woman reading book on sofa in home interior — Stock Photo
    Chinese woman reading book on sofa in home interior
    Portrait smiling, confident senior man exercising in circle — Stock Photo
    Portrait smiling, confident senior man exercising in circle
    Legs of community college students under tables in classroom — Stock Photo
    Legs of community college students under tables in classroom
    Smiling woman sitting at laptop and looking down at notebook — Stock Photo
    Smiling woman sitting at laptop and looking down at notebook
    Education objects hanging on ropes — Stock Photo
    Education objects hanging on ropes
    Stylish man in bright headphones surfing mobile phone while leaning on marble wall in sunny day — Stock Photo
    Stylish man in bright headphones surfing mobile phone while leaning on marble wall in sunny day
    Man talking to daughter and zipping up her jacket on street — Stock Photo
    Man talking to daughter and zipping up her jacket on street
    Male skeleton hand with visible proximal phalanges, computer illustration. — Stock Photo
    Male skeleton hand with visible proximal phalanges, computer illustration.
    Girl scratching head — Stock Photo
    Girl scratching head
    Illustration of small intestine in human body silhouette. — Stock Photo
    Illustration of small intestine in human body silhouette.
    High school teacher supervising students taking exam at desks — Stock Photo
    High school teacher supervising students taking exam at desks
    Students watching chef teacher in cooking class kitchen — Stock Photo
    Students watching chef teacher in cooking class kitchen
    High angle view of smiling asian mother reading book to daughter and son near tree in autumnal park — Stock Photo
    High angle view of smiling asian mother reading book to daughter and son near tree in autumnal park
    Male student on city street — Stock Photo
    Male student on city street
    Illustration of spleen in male body silhouette on white background. — Stock Photo
    Illustration of spleen in male body silhouette on white background.
    University student holding folder in Classroom — Stock Photo
    University student holding folder in Classroom
    Portrait of schoolgirls in uniform, Bali, Indonesia — Stock Photo
    Portrait of schoolgirls in uniform, Bali, Indonesia
    Female skeleton and ligaments in transparent body, computer illustration. — Stock Photo
    Female skeleton and ligaments in transparent body, computer illustration.
    Junior high students using computers in computer lab — Stock Photo
    Junior high students using computers in computer lab
    Close up portrait of a child taking a photo with a vintage camera — Stock Photo
    Close up portrait of a child taking a photo with a vintage camera