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    Preschooler boy coloring shapes with colorful pens for developmental psychology test in psychologist office. — Stock Photo
    Preschooler boy coloring shapes with colorful pens for developmental psychology test in psychologist office.
    Portrait happy junior high students and teachers in library — Stock Photo
    Portrait happy junior high students and teachers in library
    Close up view of book in hands of girl lying on bed — Stock Photo
    Close up view of book in hands of girl lying on bed
    African american students raising hands in class — Stock Photo
    African american students raising hands in class
    Side view of college student using laptop in library — Stock Photo
    Side view of college student using laptop in library
    Eager girl students raising arms behind microscopes in laboratory classroom — Stock Photo
    Eager girl students raising arms behind microscopes in laboratory classroom
    Chinese couple using laptop together in cafe — Stock Photo
    Chinese couple using laptop together in cafe
    Schoolchildren in school uniform running on sidewalk — Stock Photo
    Schoolchildren in school uniform running on sidewalk
    Dancers dancing in dance class studio — Stock Photo
    Dancers dancing in dance class studio
    Front view close up of a teenage Caucasian girl in a school classroom sitting at desk, concentrating and writing, with teenage male and female classmates sitting at desks working in the background — Stock Photo
    Front view close up of a teenage Caucasian girl in a school classroom sitting at desk, concentrating and writing, with teenage male and female classmates sitting at desks working in the background
    Closeup of tween girl looking at bug under microscope — Stock Photo
    Closeup of tween girl looking at bug under microscope
    Boy writing on paper at desk — Stock Photo
    Boy writing on paper at desk
    College students with textbook studying in library — Stock Photo
    College students with textbook studying in library
    Audience watching speakers talking on stage — Stock Photo
    Audience watching speakers talking on stage
    Chemistry apparatus glassware on table in laboratory. — Stock Photo
    Chemistry apparatus glassware on table in laboratory.
    Portrait smiling, confident male instructor at laptop preparing in classroom — Stock Photo
    Portrait smiling, confident male instructor at laptop preparing in classroom
    Young woman with book lying in light room — Stock Photo
    Young woman with book lying in light room
    Artists painting in art class studio — Stock Photo
    Artists painting in art class studio
    Community college instructor talking with students in classroom — Stock Photo
    Community college instructor talking with students in classroom
    Side view close up of a young African schoolboy sitting at his desk and turning around, looking to camera and smiling during a lesson in a township elementary school classroom. — Stock Photo
    Side view close up of a young African schoolboy sitting at his desk and turning around, looking to camera and smiling during a lesson in a township elementary school classroom.
    Students talking by school — Stock Photo
    Students talking by school
    Teacher talking to children — Stock Photo
    Teacher talking to children
    Chinese father and siblings talking in front of car with mother — Stock Photo
    Chinese father and siblings talking in front of car with mother
    Female hand drawing with pencil — Stock Photo
    Female hand drawing with pencil
    Illustration of adrenal glands in male body silhouette. — Stock Photo
    Illustration of adrenal glands in male body silhouette.
    Happy teenage girl — Stock Photo
    Happy teenage girl
    Girls learning in classroom — Stock Photo
    Girls learning in classroom
    Illustration of painful lumbar spine in human skeleton on blue background. — Stock Photo
    Illustration of painful lumbar spine in human skeleton on blue background.
    Male silhouette with visible back bones, computer illustration. — Stock Photo
    Male silhouette with visible back bones, computer illustration.
    Female paramedic CPR training on dummy with instructor outdoors. — Stock Photo
    Female paramedic CPR training on dummy with instructor outdoors.
    Crop anonymous little girl drawing with multicolored pencils on paper sheet in light room — Stock Photo
    Crop anonymous little girl drawing with multicolored pencils on paper sheet in light room
    Students and teacher drawing in classroom — Stock Photo
    Students and teacher drawing in classroom
    Thoughtful schoolboy sitting in classroom — Stock Photo
    Thoughtful schoolboy sitting in classroom
    Anonymous female writing with a blue pen in a notepad while near sea — Stock Photo
    Anonymous female writing with a blue pen in a notepad while near sea
    3d rendered illustration of human knee on white background. — Stock Photo
    3d rendered illustration of human knee on white background.
    Young couples college students studying at table — Stock Photo
    Young couples college students studying at table
    Father and his sons using laptop at home — Stock Photo
    Father and his sons using laptop at home
    Community college journalism students at microphone in classroom — Stock Photo
    Community college journalism students at microphone in classroom
    African american boy in online school class, using laptop and writing in his notebook. at home in isolation during quarantine lockdown. — Stock Photo
    African american boy in online school class, using laptop and writing in his notebook. at home in isolation during quarantine lockdown.
    Happy boy against wall — Stock Photo
    Happy boy against wall
    Audience on conference hall, business meeting and people concept — Stock Photo
    Audience on conference hall, business meeting and people concept
    Woman smooth wet clay jug — Stock Photo
    Woman smooth wet clay jug
    Side view of ginger girl lying on bed and writing in notepad — Stock Photo
    Side view of ginger girl lying on bed and writing in notepad
    Schoolgirl raising hand — Stock Photo
    Schoolgirl raising hand
    Young student learning from teacher by remote education — Stock Photo
    Young student learning from teacher by remote education
    Boys drawing together at table in home — Stock Photo
    Boys drawing together at table in home
    Portrait of smiling schoolboy — Stock Photo
    Portrait of smiling schoolboy
    Over head view of African man reading book while sitting on rocks of shoreline. — Stock Photo
    Over head view of African man reading book while sitting on rocks of shoreline.
    Male speaker with microphone talking to audience — Stock Photo
    Male speaker with microphone talking to audience
    Orange colored lungs in female body silhouette, computer illustration. — Stock Photo
    Orange colored lungs in female body silhouette, computer illustration.
    African American girl strolling enjoying music with her headphones in the park — Stock Photo
    African American girl strolling enjoying music with her headphones in the park
    Illustration of lung tumour in transparent male silhouette. — Stock Photo
    Illustration of lung tumour in transparent male silhouette.
    University female african student wearing protective face mask studying sitting on stairs outside on campus. New normal in college. — Stock Photo
    University female african student wearing protective face mask studying sitting on stairs outside on campus. New normal in college.
    Male skeleton in transparent body silhouette, computer illustration. — Stock Photo
    Male skeleton in transparent body silhouette, computer illustration.
    Young woman reads a book lying on a couch — Stock Photo
    Young woman reads a book lying on a couch
    Female musculature in transparent silhouette, rear view, computer illustration. — Stock Photo
    Female musculature in transparent silhouette, rear view, computer illustration.
    Microscope in laboratory on blue background. — Stock Photo
    Microscope in laboratory on blue background.
    Boy holding figure on chess board — Stock Photo
    Boy holding figure on chess board
    High school students talking and walking in corridor — Stock Photo
    High school students talking and walking in corridor
    University student using microscope — Stock Photo
    University student using microscope