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    Blond girl in trench-coat with leather briefcase walking in front of wooden house — Stock Photo
    Blond girl in trench-coat with leather briefcase walking in front of wooden house
    Smiling male teacher and students programming robotics at laptop in classroom — Stock Photo
    Smiling male teacher and students programming robotics at laptop in classroom
    Illustration of glass heart on black background. — Stock Photo
    Illustration of glass heart on black background.
    Young female college student using digital tablet on dorm room bunk bed — Stock Photo
    Young female college student using digital tablet on dorm room bunk bed
    Talus bones in x-ray computer illustration of human foot. — Stock Photo
    Talus bones in x-ray computer illustration of human foot.
    Illustration of human thorax anatomy in body silhouette. — Stock Photo
    Illustration of human thorax anatomy in body silhouette.
    Visible skeleton in female body silhouette in rear view, computer illustration. — Stock Photo
    Visible skeleton in female body silhouette in rear view, computer illustration.
    Community college students watching instructor leading lesson at projection screen in classroom — Stock Photo
    Community college students watching instructor leading lesson at projection screen in classroom
    Junior high school students using virtual reality simulators in dark classroom — Stock Photo
    Junior high school students using virtual reality simulators in dark classroom
    Active senior couple dancing in dance studio — Stock Photo
    Active senior couple dancing in dance studio
    Male anatomy showing Tibialis anterior muscle, computer illustration. — Stock Photo
    Male anatomy showing Tibialis anterior muscle, computer illustration.
    Young elegant woman in eyeglasses sitting with book on bench in city garden — Stock Photo
    Young elegant woman in eyeglasses sitting with book on bench in city garden
    Female teacher and curious girl students examining molecular structure in laboratory classroom — Stock Photo
    Female teacher and curious girl students examining molecular structure in laboratory classroom
    Sisters doing their homework in living room at home — Stock Photo
    Sisters doing their homework in living room at home
    Illustration of larynx in male body silhouette, close-up. — Stock Photo
    Illustration of larynx in male body silhouette, close-up.
    Female paramedic with instructor CPR training on baby dummy outdoors. — Stock Photo
    Female paramedic with instructor CPR training on baby dummy outdoors.
    Creative business people meeting, using laptop and reading paperwork — Stock Photo
    Creative business people meeting, using laptop and reading paperwork
    Little girls on morning prayer — Stock Photo
    Little girls on morning prayer
    Teacher explaining formula at blackboard in school — Stock Photo
    Teacher explaining formula at blackboard in school
    Girl sitting in her bedroom doing her homework — Stock Photo
    Girl sitting in her bedroom doing her homework
    Group portrait of schoolchildren wearing school uniforms standing in corridor and smiling — Stock Photo
    Group portrait of schoolchildren wearing school uniforms standing in corridor and smiling
    Girl writing in chalk on a chalkboard — Stock Photo
    Girl writing in chalk on a chalkboard
    Schoolboy raising hand — Stock Photo
    Schoolboy raising hand
    Young college student with books walking in library — Stock Photo
    Young college student with books walking in library
    Illustration of colon in male body silhouette on white background. — Stock Photo
    Illustration of colon in male body silhouette on white background.
    Male teacher and smiling girl student conducting scientific experiment at microscope in laboratory classroom — Stock Photo
    Male teacher and smiling girl student conducting scientific experiment at microscope in laboratory classroom
    Front view of a male Caucasian teacher standing and talking to a mixed race teenager male student sitting at his desk using a laptop in a high school classroom, with his multi-ethnic male and female classmates sitting at desks working around him — Stock Photo
    Front view of a male Caucasian teacher standing and talking to a mixed race teenager male student sitting at his desk using a laptop in a high school classroom, with his multi-ethnic male and female classmates sitting at desks working around him
    Focused high school students taking exam at desks in classroom — Stock Photo
    Focused high school students taking exam at desks in classroom
    Schoolchildren in classroom — Stock Photo
    Schoolchildren in classroom
    College students hanging out studying on park bench — Stock Photo
    College students hanging out studying on park bench
    Student in wheelchair studying furnace electronic control system in HVAC classroom — Stock Photo
    Student in wheelchair studying furnace electronic control system in HVAC classroom
    Multiple armed businessman reading books — Stock Photo
    Multiple armed businessman reading books
    Crop woman with book between legs — Stock Photo
    Crop woman with book between legs
    Boy wearing headphones as playing with building blocks while hearing test with female taking notes. — Stock Photo
    Boy wearing headphones as playing with building blocks while hearing test with female taking notes.
    Eacher teaching mathematics to children — Stock Photo
    Eacher teaching mathematics to children
    Side view of a Caucasian teenage male high school student in an empty high school theatre preparing before a performance, standing on the stage, holding a script and practicing his part — Stock Photo
    Side view of a Caucasian teenage male high school student in an empty high school theatre preparing before a performance, standing on the stage, holding a script and practicing his part
    Teenage girl and everyday life. Reading — Stock Photo
    Teenage girl and everyday life. Reading
    Chinese children sitting at table in museum — Stock Photo
    Chinese children sitting at table in museum
    Mother and daughter drawing — Stock Photo
    Mother and daughter drawing
    Hand of female paramedic using defibrillator while training outdoors. — Stock Photo
    Hand of female paramedic using defibrillator while training outdoors.
    Schoolgirl writing on whiteboard — Stock Photo
    Schoolgirl writing on whiteboard
    Nerves of human pelvis, computer illustration. — Stock Photo
    Nerves of human pelvis, computer illustration.
    Portrait of schoolboy in classroom — Stock Photo
    Portrait of schoolboy in classroom
    Female teacher and girl students researching at laptop in library — Stock Photo
    Female teacher and girl students researching at laptop in library
    Latin woman with dog on wooden bench outdoors. — Stock Photo
    Latin woman with dog on wooden bench outdoors.
    Instructor helping female paramedic using defibrillator training outdoors. — Stock Photo
    Instructor helping female paramedic using defibrillator training outdoors.
    Smiling female artists painting wooden bench blue in art class workshop — Stock Photo
    Smiling female artists painting wooden bench blue in art class workshop
    Focused girl doing homework assignment while sitting near adult woman sewing garment at home — Stock Photo
    Focused girl doing homework assignment while sitting near adult woman sewing garment at home
    View of Audience clapping — Stock Photo
    View of Audience clapping
    View of boy programming at computer in classroom on digital camera viewfinder — Stock Photo
    View of boy programming at computer in classroom on digital camera viewfinder
    Professor with muscular dystrophy working with students in a laboratory — Stock Photo
    Professor with muscular dystrophy working with students in a laboratory
    Portrait of a young Caucasian female fashion student smiling to camera while working on a design in a studio at fashion college — Stock Photo
    Portrait of a young Caucasian female fashion student smiling to camera while working on a design in a studio at fashion college
    Smiling female speaker with microphone on stage — Stock Photo
    Smiling female speaker with microphone on stage
    Male anatomy showing Procerus muscle, computer illustration. — Stock Photo
    Male anatomy showing Procerus muscle, computer illustration.
    Students putting books in drawe — Stock Photo
    Students putting books in drawe
    Illustration of upper body skeleton in transparent male silhouette. — Stock Photo
    Illustration of upper body skeleton in transparent male silhouette.
    Girl seated at a laptop computer — Stock Photo
    Girl seated at a laptop computer
    Students in a computer class — Stock Photo
    Students in a computer class
    Smiling female science teacher and girl student reading textbook at microscope in laboratory classroom — Stock Photo
    Smiling female science teacher and girl student reading textbook at microscope in laboratory classroom
    Young woman with a book on her head bored on wooden background — Stock Photo
    Young woman with a book on her head bored on wooden background