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    Front view of a teenage Caucasian boy and a teenage African American girl in a high school classroom sitting a desk, using a tablet computer, with teenage classmates sitting at desks working in the background — Stock Photo
    Front view of a teenage Caucasian boy and a teenage African American girl in a high school classroom sitting a desk, using a tablet computer, with teenage classmates sitting at desks working in the background
    Closeup view of stack of books on vintage suitcase — Stock Photo
    Closeup view of stack of books on vintage suitcase
    Close-up of a stack of hardback books — Stock Photo
    Close-up of a stack of hardback books
    Portrait smiling, confident girl students researching at computer in library — Stock Photo
    Portrait smiling, confident girl students researching at computer in library
    Young elegant woman in eyeglasses reading book and sitting on bench in city garden — Stock Photo
    Young elegant woman in eyeglasses reading book and sitting on bench in city garden
    Female teacher and girl student conducting scientific experiment at microscope in laboratory — Stock Photo
    Female teacher and girl student conducting scientific experiment at microscope in laboratory
    Female friends talking in locker room — Stock Photo
    Female friends talking in locker room
    Junior high boy students using computers in computer lab — Stock Photo
    Junior high boy students using computers in computer lab
    Side view of teenage girl reading book while sitting by shelf in library — Stock Photo
    Side view of teenage girl reading book while sitting by shelf in library
    Caucasian male teacher holding windmill model teaching boy and girl in environment class at school. school and education concept — Stock Photo
    Caucasian male teacher holding windmill model teaching boy and girl in environment class at school. school and education concept
    Men reading and discussing bible in prayer group — Stock Photo
    Men reading and discussing bible in prayer group
    Junior high school students doing homework at desks in classroom — Stock Photo
    Junior high school students doing homework at desks in classroom
    Children using digital tablet — Stock Photo
    Children using digital tablet
    Side view close up of a young African schoolboy standing at the front of the class writing on the blackboard during a lesson in a township elementary school classroom — Stock Photo
    Side view close up of a young African schoolboy standing at the front of the class writing on the blackboard during a lesson in a township elementary school classroom
    Chinese boy and girl studying on porch — Stock Photo
    Chinese boy and girl studying on porch
    Doctor examining x-ray at hospital — Stock Photo
    Doctor examining x-ray at hospital
    Woman using digital tablet in library — Stock Photo
    Woman using digital tablet in library
    Community college students studying in classroom — Stock Photo
    Community college students studying in classroom
    Girl homeschooling in living room with dog sleeping in background — Stock Photo
    Girl homeschooling in living room with dog sleeping in background
    Thoughtful schoolgirl smiling — Stock Photo
    Thoughtful schoolgirl smiling
    Close-up of archaeology researcher documenting lithics with camera in laboratory. — Stock Photo
    Close-up of archaeology researcher documenting lithics with camera in laboratory.
    Focused young woman in wheelchair using laptop at dining table — Stock Photo
    Focused young woman in wheelchair using laptop at dining table
    Multiethnic male and female friends — Stock Photo
    Multiethnic male and female friends
    Portrait confident mature female student at computer in computer lab — Stock Photo
    Portrait confident mature female student at computer in computer lab
    Side view of a multi-ethnic group of teenage male and female high school pupils in a classroom, working on computers and concentrating — Stock Photo
    Side view of a multi-ethnic group of teenage male and female high school pupils in a classroom, working on computers and concentrating
    Two teenage boys studying in a school — Stock Photo
    Two teenage boys studying in a school
    Female student holding equipment while practicing experiment in laboratory — Stock Photo
    Female student holding equipment while practicing experiment in laboratory
    College students using digital tablet in stairway — Stock Photo
    College students using digital tablet in stairway
    University students in chemical experiment at laboratory — Stock Photo
    University students in chemical experiment at laboratory
    Student writing on adhesive note in book — Stock Photo
    Student writing on adhesive note in book
    Portrait of a young, studying woman — Stock Photo
    Portrait of a young, studying woman
    Female college students studying at desk in classroom — Stock Photo
    Female college students studying at desk in classroom
    Ballerina in white tutu practicing ballet dance in studio — Stock Photo
    Ballerina in white tutu practicing ballet dance in studio
    Male gay parents helping children with homework at counter — Stock Photo
    Male gay parents helping children with homework at counter
    Young woman looking at friend — Stock Photo
    Young woman looking at friend
    Doctors holding and pointing at x-ray of human foot. — Stock Photo
    Doctors holding and pointing at x-ray of human foot.
    Woman turning pages — Stock Photo
    Woman turning pages
    Front view close up of two young African schoolgirls leaning on their desk, looking up and listening during a lesson in a township elementary school classroom, in the background classmates are listening and writing in their books — Stock Photo
    Front view close up of two young African schoolgirls leaning on their desk, looking up and listening during a lesson in a township elementary school classroom, in the background classmates are listening and writing in their books
    Student in wheelchair studying natural gas injector system on furnace in HVAC classroom — Stock Photo
    Student in wheelchair studying natural gas injector system on furnace in HVAC classroom
    Young asian college students studying together — Stock Photo
    Young asian college students studying together
    Boy with schoolbag in classroom — Stock Photo
    Boy with schoolbag in classroom
    Student with professor teaching in background — Stock Photo
    Student with professor teaching in background
    Young female scientist with microscope in laboratory. — Stock Photo
    Young female scientist with microscope in laboratory.
    Thoughtful woman choosing flowers on market — Stock Photo
    Thoughtful woman choosing flowers on market
    Focused female college student researching using computer in library — Stock Photo
    Focused female college student researching using computer in library
    Side view of teenage girl using microscope while practicing experiment in lab — Stock Photo
    Side view of teenage girl using microscope while practicing experiment in lab
    Portrait of university student in protective eyewear at laboratory — Stock Photo
    Portrait of university student in protective eyewear at laboratory
    Teacher assisting schoolboy studying — Stock Photo
    Teacher assisting schoolboy studying
    Happy rural teacher and pupils in outdoor learning — Stock Photo
    Happy rural teacher and pupils in outdoor learning
    Man sitting on floor in rehearsal studio — Stock Photo
    Man sitting on floor in rehearsal studio
    Two young students are on a university campus. Multiethnic concept — Stock Photo
    Two young students are on a university campus. Multiethnic concept
    Two women studying a climbing routei n Toix Est, Calpe, Costa Blanca, Alicante Province, Spain — Stock Photo
    Two women studying a climbing routei n Toix Est, Calpe, Costa Blanca, Alicante Province, Spain
    Front view close up of a young African schoolgirl sitting at a desk smiling and listening attentively during a lesson in a township elementary school classroom — Stock Photo
    Front view close up of a young African schoolgirl sitting at a desk smiling and listening attentively during a lesson in a township elementary school classroom
    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
    Mother helping daughter with homework in kitchen at home — Stock Photo
    Mother helping daughter with homework in kitchen at home
    Instructor training students about air conditioning units in HVAC classroom — Stock Photo
    Instructor training students about air conditioning units in HVAC classroom
    Smiling students at computer in adult education classroom — Stock Photo
    Smiling students at computer in adult education classroom
    Young beautiful woman working with laptop in bedroom — Stock Photo
    Young beautiful woman working with laptop in bedroom
    Front view of a young African schoolgirl leaning on her desk and looking up while writing in her notebook during a lesson in a township elementary school classroom, beside her and in the background her classmates are writing in their books — Stock Photo
    Front view of a young African schoolgirl leaning on her desk and looking up while writing in her notebook during a lesson in a township elementary school classroom, beside her and in the background her classmates are writing in their books
    Female scientist using pipette in laboratory — Stock Photo
    Female scientist using pipette in laboratory