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    Focused boy doing homework assignment while sitting near adult woman sewing garment at home — Stock Photo
    Focused boy doing homework assignment while sitting near adult woman sewing garment at home
    Group of multi ethnic kids sitting on their desk during the lesson with a Caucasian female teacher. 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 Caucasian female teacher. Primary education social distancing health safety during Covid19 Coronavirus pandemic.
    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.
    Girl rising hand up and answer to teacher — Stock Photo
    Girl rising hand up and answer to teacher
    Nervous system of female neck, computer illustration. — Stock Photo
    Nervous system of female neck, computer illustration.
    African american father and son sitting at table, writing in notebook smiling at home in isolation during quarantine lockdown. — Stock Photo
    African american father and son sitting at table, writing in notebook smiling at home in isolation during quarantine lockdown.
    University student listening to IT seminar, students sitting in background — Stock Photo
    University student listening to IT seminar, students sitting in background
    Teacher and Young Students — Stock Photo
    Teacher and Young Students
    Teacher and Young Students — Stock Photo
    Teacher and Young Students
    University professor with Muscular Dystrophy teaching students in a classroom — Stock Photo
    University professor with Muscular Dystrophy teaching students in a classroom
    Bearded male musician in eyeglasses sitting on couch with guitar and writing notes on table while using headphones and laptop — Stock Photo
    Bearded male musician in eyeglasses sitting on couch with guitar and writing notes on table while using headphones and laptop
    Woman reading a book in living room — Stock Photo
    Woman reading a book in living room
    Kid drawing on canvas at home — Stock Photo
    Kid drawing on canvas at home
    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.
    Thorax bones in x-ray digital illustration of human body. — Stock Photo
    Thorax bones in x-ray digital illustration of human body.
    Front view of a teenage Caucasian boy in a high school classroom sitting at desk, raising his hand to answer a question, with teenage male classmates sitting at desks working in the background — Stock Photo
    Front view of a teenage Caucasian boy in a high school classroom sitting at desk, raising his hand to answer a question, with teenage male classmates sitting at desks working in the background
    Curious kids stacking large dominos at interactive exhibit in science center — Stock Photo
    Curious kids stacking large dominos at interactive exhibit in science center
    Illustration of back bones in human skeleton. — Stock Photo
    Illustration of back bones in human skeleton.
    Young female classmates in casual wear standing close while talking about studying in corridor of university — Stock Photo
    Young female classmates in casual wear standing close while talking about studying in corridor of university
    Students reading book on steps — Stock Photo
    Students reading book on steps
    Front view close up of a middle aged African female school teacher standing at the front of the class pointing at the blackboard with pupils watching from their desks during a lesson in a township elementary school classroom — Stock Photo
    Front view close up of a middle aged African female school teacher standing at the front of the class pointing at the blackboard with pupils watching from their desks during a lesson in a township elementary school classroom
    Chinese woman studying with laptop in cafe — Stock Photo
    Chinese woman studying with laptop in cafe
    Illustration of colored liver in human body silhouette, close-up. — Stock Photo
    Illustration of colored liver in human body silhouette, close-up.
    Eacher teaching mathematics to children — Stock Photo
    Eacher teaching mathematics to children
    Portrait of a Caucasian female teacher with blonde hair standing in an elementary school classroom. Primary education social distancing health safety during Covid19 Coronavirus pandemic. — Stock Photo
    Portrait of a Caucasian female teacher with blonde hair standing in an elementary school classroom. Primary education social distancing health safety during Covid19 Coronavirus pandemic.
    Side view of college student digital tablet in campus — Stock Photo
    Side view of college student digital tablet in campus
    Courtyard Of Coimbra University — Stock Photo
    Courtyard Of Coimbra University
    African american students talking in class — Stock Photo
    African american students talking in class
    Mid adult man with teenage boys using laptop in kitchen — Stock Photo
    Mid adult man with teenage boys using laptop in kitchen
    Male silhouette with back pain, digital illustration. — Stock Photo
    Male silhouette with back pain, digital illustration.
    Students using digital tablet and laptop in library — Stock Photo
    Students using digital tablet and laptop in library
    3d rendered illustration of knee in human skeleton. — Stock Photo
    3d rendered illustration of knee in human skeleton.
    Illustration of senior woman silhouette showing bladder on black background. — Stock Photo
    Illustration of senior woman silhouette showing bladder on black background.
    Physical therapist performing foot pressure scan for child on illuminated platform. — Stock Photo
    Physical therapist performing foot pressure scan for child on illuminated platform.
    Focused high school boy student taking exam at desk — Stock Photo
    Focused high school boy student taking exam at desk
    Abstract male head and neck bones, computer illustration. — Stock Photo
    Abstract male head and neck bones, computer illustration.
    A child in a white shirt is fooling around under the covers. — Stock Photo
    A child in a white shirt is fooling around under the covers.
    Smiling active seniors and instructor stretching, exercising with straps — Stock Photo
    Smiling active seniors and instructor stretching, exercising with straps
    Cute schoolchild standing on brown background in studio and looking at camera — Stock Photo
    Cute schoolchild standing on brown background in studio and looking at camera
    Portrait confident college students in lab coats in science laboratory classroom — Stock Photo
    Portrait confident college students in lab coats in science laboratory classroom
    African american girl wearing face mask studying while sitting on her desk in the class at school. hygiene and social distancing at school during covid 19 pandemic — Stock Photo
    African american girl wearing face mask studying while sitting on her desk in the class at school. hygiene and social distancing at school during covid 19 pandemic
    Boy reading a book in armchair in living room at home — Stock Photo
    Boy reading a book in armchair in living room at home
    Illustration of cross section of intestine on white background. — Stock Photo
    Illustration of cross section of intestine on white background.
    Thoughtful woman writing on diary at home in kitchen — Stock Photo
    Thoughtful woman writing on diary at home in kitchen
    Businessman and businesswoman reviewing and discussing paperwork in office — Stock Photo
    Businessman and businesswoman reviewing and discussing paperwork in office
    Side view of crop ethnic female writing in paper planner hanging on refrigerator in kitchen — Stock Photo
    Side view of crop ethnic female writing in paper planner hanging on refrigerator in kitchen
    Side view of male dentistry student in uniform and gloves working with microscope while performing dental operation in modern classroom — Stock Photo
    Side view of male dentistry student in uniform and gloves working with microscope while performing dental operation in modern classroom
    Female college students talking in stairway — Stock Photo
    Female college students talking in stairway
    Mother and child reading book — Stock Photo
    Mother and child reading book
    Instructor discussing fuel mixture controls for furnace in HVAC classroom while one student in wheelchair taking notes — Stock Photo
    Instructor discussing fuel mixture controls for furnace in HVAC classroom while one student in wheelchair taking notes
    Young woman reading book — Stock Photo
    Young woman reading book
    High angle side 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 side 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
    Back to school, modern geomeric background, pink Pencil and shavings from sharpening. — Stock Photo
    Back to school, modern geomeric background, pink Pencil and shavings from sharpening.
    Rear view of schoolgirl playing violin in music school — Stock Photo
    Rear view of schoolgirl playing violin in music school
    Teenage girl wearing headphones, drawing on paper — Stock Photo
    Teenage girl wearing headphones, drawing on paper
    Legs of community college students under tables in classroom — Stock Photo
    Legs of community college students under tables in classroom
    Portrait of confident, smiling junior high student — Stock Photo
    Portrait of confident, smiling junior high student
    Transparent male silhouette with visible adrenal glands, computer illustration. — Stock Photo
    Transparent male silhouette with visible adrenal glands, computer illustration.
    African american boy sitting at table, writing in notebook. at home in isolation during quarantine lockdown. — Stock Photo
    African american boy sitting at table, writing in notebook. at home in isolation during quarantine lockdown.
    Front view of a young African American girl at home, sitting at the dinner table using crayons and doing her homework, exposed brick wall in the background — Stock Photo
    Front view of a young African American girl at home, sitting at the dinner table using crayons and doing her homework, exposed brick wall in the background