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    Schoolgirl raising hand — Stock Photo
    Schoolgirl raising hand
    Abstract male shoulder bones, computer illustration. — Stock Photo
    Abstract male shoulder bones, computer illustration.
    Abstract male silhouette with visible brain and nerves of nervous system, computer illustration. — Stock Photo
    Abstract male silhouette with visible brain and nerves of nervous system, computer illustration.
    Side view of young woman explaining study task to positive son sitting at table with computer and textbook during online lesson at home — Stock Photo
    Side view of young woman explaining study task to positive son sitting at table with computer and textbook during online lesson at home
    3d illustration of virus particles and intestinal villi. — Stock Photo
    3d illustration of virus particles and intestinal villi.
    Chinese woman sitting in cafe and holding book — Stock Photo
    Chinese woman sitting in cafe and holding book
    Smiling high school girl student leaving classroom — Stock Photo
    Smiling high school girl student leaving classroom
    Young man reading book — Stock Photo
    Young man reading book
    Junior high students using computers in computer lab — Stock Photo
    Junior high students using computers in computer lab
    Lung cancer in anatomy of male body, computer illustration. — Stock Photo
    Lung cancer in anatomy of male body, computer illustration.
    Male anatomy showing Orbicularis oculi muscle, computer illustration. — Stock Photo
    Male anatomy showing Orbicularis oculi muscle, computer illustration.
    Male anatomy showing Rhomboid major muscle, computer illustration. — Stock Photo
    Male anatomy showing Rhomboid major muscle, computer illustration.
    University student with raised eyebrow during seminar in classroom — Stock Photo
    University student with raised eyebrow during seminar in classroom
    Grandfather at table with grandson doing homework — Stock Photo
    Grandfather at table with grandson doing homework
    Focused junior high girl student using computer in computer lab — Stock Photo
    Focused junior high girl student using computer in computer lab
    High school students studying in classroom — Stock Photo
    High school students studying in classroom
    Girl sitting at table and browsing the cellphone while doing homework assignment at home — Stock Photo
    Girl sitting at table and browsing the cellphone while doing homework assignment at home
    Happy young male college students studying and talking in classroom — Stock Photo
    Happy young male college students studying and talking in classroom
    Happy preteen girl friends eating candy and studying on bed — Stock Photo
    Happy preteen girl friends eating candy and studying on bed
    Cropped image of male college student doing geometry math homework in library — Stock Photo
    Cropped image of male college student doing geometry math homework in library
    Illustration of senior woman silhouette showing larynx on white background. — Stock Photo
    Illustration of senior woman silhouette showing larynx on white background.
    Serene active seniors practicing yoga in circle — Stock Photo
    Serene active seniors practicing yoga in circle
    Young male student — Stock Photo
    Young male student
    Young female college student listening to classmate in classroom — Stock Photo
    Young female college student listening to classmate in classroom
    Small girl with backpack — Stock Photo
    Small girl with backpack
    Illustration of shoulder joint in human skeleton. — Stock Photo
    Illustration of shoulder joint in human skeleton.
    Man offering flower to woman sitting on books — Stock Photo
    Man offering flower to woman sitting on books
    Happy young women with Down Syndrome cooking in restaurant — Stock Photo
    Happy young women with Down Syndrome cooking in restaurant
    Hands of female paramedic CPR training on baby dummy outdoors. — Stock Photo
    Hands of female paramedic CPR training on baby dummy outdoors.
    College students with books and coffee walking in park — Stock Photo
    College students with books and coffee walking in park
    Smiling high school girl student talking with classmates in classroom — Stock Photo
    Smiling high school girl student talking with classmates in classroom
    African american student smiling in class — Stock Photo
    African american student smiling in class
    Attentive college student reading a book in library — Stock Photo
    Attentive college student reading a book in library
    Young women friends applying makeup — Stock Photo
    Young women friends applying makeup
    Teenage girl operating video camera, vlogging — Stock Photo
    Teenage girl operating video camera, vlogging
    Portrait smiling female college student taking notes in science laboratory classroom — Stock Photo
    Portrait smiling female college student taking notes in science laboratory classroom
    Junior high boy student talking to girl in corridor — Stock Photo
    Junior high boy student talking to girl in corridor
    Side view of a young African American male fashion student talking on a smartphone and working on a design in a studio at fashion college — Stock Photo
    Side view of a young African American male fashion student talking on a smartphone and working on a design in a studio at fashion college
    Elegant unemotional young woman in sundress standing against table with assorted textbooks in bookstore — Stock Photo
    Elegant unemotional young woman in sundress standing against table with assorted textbooks in bookstore
    Man drinking coffee on city street — Stock Photo
    Man drinking coffee on city street
    Happy young friends with Down Syndrome in sunny cafe — Stock Photo
    Happy young friends with Down Syndrome in sunny cafe
    View of Enthusiastic audience cheering — Stock Photo
    View of Enthusiastic audience cheering
    Illustration of human heart in body silhouette. — Stock Photo
    Illustration of human heart in body silhouette.
    Group of multi ethnic kids sitting on their desk during the lesson with a female teacher wearing a face mask. Primary education social distancing health safety during Covid19 Coronavirus pandemic. — Stock Photo
    Group of multi ethnic kids sitting on their desk during the lesson with a female teacher wearing a face mask. Primary education social distancing health safety during Covid19 Coronavirus pandemic.
    Young male student with Down Syndrome baking bread in kitchen — Stock Photo
    Young male student with Down Syndrome baking bread in kitchen
    Teenage girl friends vlogging about makeup on bed in bedroom — Stock Photo
    Teenage girl friends vlogging about makeup on bed in bedroom
    Young man looking at the camera and smiling — Stock Photo
    Young man looking at the camera and smiling
    Male anatomy showing Procerus muscle, computer illustration. — Stock Photo
    Male anatomy showing Procerus muscle, computer illustration.
    College students texting with cell phone — Stock Photo
    College students texting with cell phone
    Girl looking under microscope at worm. — Stock Photo
    Girl looking under microscope at worm.
    Illustration of knee bones in human skeleton on blue background. — Stock Photo
    Illustration of knee bones in human skeleton on blue background.
    Smiling little blonde lying on the floor — Stock Photo
    Smiling little blonde lying on the floor
    Young woman holding mobile phone — Stock Photo
    Young woman holding mobile phone
    Children playing in an inner courtyard and painting with water paints — Stock Photo
    Children playing in an inner courtyard and painting with water paints
    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.
    Side view of a mixed race teenage boy and African American teenage girl high school student sitting on chairs in an empty school theatre preparing before a performance, holding scripts and rehearsing together — Stock Photo
    Side view of a mixed race teenage boy and African American teenage girl high school student sitting on chairs in an empty school theatre preparing before a performance, holding scripts and rehearsing together
    Male anatomy showing Omohyoid muscle, computer illustration. — Stock Photo
    Male anatomy showing Omohyoid muscle, computer illustration.
    Adorable schoolgirl playing piano in music school — Stock Photo
    Adorable schoolgirl playing piano in music school
    Illustration of painful atlas in human skeleton on blue background. — Stock Photo
    Illustration of painful atlas in human skeleton on blue background.
    Transparent male silhouette with colored cranium bones, computer illustration. — Stock Photo
    Transparent male silhouette with colored cranium bones, computer illustration.