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    Female doctor practicing cardiopulmonary resuscitation on infant training dummy. — Stock Photo
    Female doctor practicing cardiopulmonary resuscitation on infant training dummy.
    Junior high boy students and male teacher taking selfie with smart phone — Stock Photo
    Junior high boy students and male teacher taking selfie with smart phone
    Male teacher calling on students in classroom — Stock Photo
    Male teacher calling on students in classroom
    Crop unrecognizable student holding denture and a pencil while sitting at table during dentistry class — Stock Photo
    Crop unrecognizable student holding denture and a pencil while sitting at table during dentistry class
    Mature teacher explaining student — Stock Photo
    Mature teacher explaining student
    Portrait of bearded man using phone and writing at table — Stock Photo
    Portrait of bearded man using phone and writing at table
    Female fashion designers at dressmakers model in studio — Stock Photo
    Female fashion designers at dressmakers model in studio
    Teacher standing with student — Stock Photo
    Teacher standing with student
    Teacher helping junior high students using computer in computer lab — Stock Photo
    Teacher helping junior high students using computer in computer lab
    Cropped unrecognizable female working typing on computer at convenient workplace — Stock Photo
    Cropped unrecognizable female working typing on computer at convenient workplace
    Happy mature female teacher sitting at school desk — Stock Photo
    Happy mature female teacher sitting at school desk
    Scientific laboratory researcher using test tube and microscope. — Stock Photo
    Scientific laboratory researcher using test tube and microscope.
    Male high school teacher leading lesson at projection screen in classroom — Stock Photo
    Male high school teacher leading lesson at projection screen in classroom
    Concentrated young African American female freelancer with curly long hair in casual clothes and eyeglasses sitting on comfortable bed with laptop and notebook during remote work — Stock Photo
    Concentrated young African American female freelancer with curly long hair in casual clothes and eyeglasses sitting on comfortable bed with laptop and notebook during remote work
    Young asian business woman working at home — Stock Photo
    Young asian business woman working at home
    Male teacher leading lesson at touch screen in classroom — Stock Photo
    Male teacher leading lesson at touch screen in classroom
    Front view of a middle aged African female school teacher helping a young African schoolgirl sitting at her desk during a lesson in a township elementary school classroom, beside her and in the background classmates are writing in their books — Stock Photo
    Front view of a middle aged African female school teacher helping a young African schoolgirl sitting at her desk during a lesson in a township elementary school classroom, beside her and in the background classmates are writing in their books
    Girl drawing bar graph — Stock Photo
    Girl drawing bar graph
    Students and teacher in classroom — Stock Photo
    Students and teacher in classroom
    Portrait smiling, confident male community college instructor in classroom — Stock Photo
    Portrait smiling, confident male community college instructor in classroom
    Female artists working in art studio — Stock Photo
    Female artists working in art studio
    Female nurses talking in conference audience — Stock Photo
    Female nurses talking in conference audience
    Side view of a multi-ethnic group of teenage pupils sitting at desks in class studying at school with a Caucasian male teacher standing and talking to one Caucasian girl at her desk — Stock Photo
    Side view of a multi-ethnic group of teenage pupils sitting at desks in class studying at school with a Caucasian male teacher standing and talking to one Caucasian girl at her desk
    Tired man using laptop computer lying on bed at home — Stock Photo
    Tired man using laptop computer lying on bed at home
    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
    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.
    Asian woman reading textbook while leaning on brick wall in university campus — Stock Photo
    Asian woman reading textbook while leaning on brick wall in university campus
    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.
    Young woman pets her cat while she is working from home — Stock Photo
    Young woman pets her cat while she is working from home
    Business people using digital tablet at technology conference — Stock Photo
    Business people using digital tablet at technology conference
    Male electrician student using screwdriver — Stock Photo
    Male electrician student using screwdriver
    Female professor using laptop — Stock Photo
    Female professor using laptop
    High school teacher leading lesson, calling on students with arms raised in classroom — Stock Photo
    High school teacher leading lesson, calling on students with arms raised in classroom
    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
    Unrecognizable little girl demonstrating sketchbook with doodles while sitting on sofa and drawing at home — Stock Photo
    Unrecognizable little girl demonstrating sketchbook with doodles while sitting on sofa and drawing at home
    Side view close up of a young African schoolgirl sitting at her 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 schoolgirl sitting at her desk and turning around, looking to camera and smiling during a lesson in a township elementary school classroom.
    Concentrated young African American female in casual wear and eyeglasses looking at laptop screen and reading professional information while working at table in office — Stock Photo
    Concentrated young African American female in casual wear and eyeglasses looking at laptop screen and reading professional information while working at table in office
    Students showing off drawings — Stock Photo
    Students showing off drawings
    From above of crop male dentistry student in uniform and gloves preparing dental simulator for treatment during work in modern classroom — Stock Photo
    From above of crop male dentistry student in uniform and gloves preparing dental simulator for treatment during work in modern classroom
    Teacher and students playing at interactive exhibit in science center — Stock Photo
    Teacher and students playing at interactive exhibit in science center
    Community college instructor and student talking in computer lab classroom — Stock Photo
    Community college instructor and student talking in computer lab classroom
    From above crop male student hands holding denture and paste while sitting at table during dentistry class — Stock Photo
    From above crop male student hands holding denture and paste while sitting at table during dentistry class
    Male teacher leading lesson in classroom — Stock Photo
    Male teacher leading lesson in classroom
    Image focused on the hands of a man with his mobile phone on a wooden bench in a park. — Stock Photo
    Image focused on the hands of a man with his mobile phone on a wooden bench in a park.
    Teacher and students playing at interactive exhibit in science center — Stock Photo
    Teacher and students playing at interactive exhibit in science center
    Young focused curly haired woman in denim outfit sitting with laptop on wooden bench in enclosed urban passage — Stock Photo
    Young focused curly haired woman in denim outfit sitting with laptop on wooden bench in enclosed urban passage
    Side view of a Caucasian male high school teacher sitting on a chair on the stage in an empty school theatre during rehearsals for a performance, preparing a multi-ethnic group of teenager high school students for a performance — Stock Photo
    Side view of a Caucasian male high school teacher sitting on a chair on the stage in an empty school theatre during rehearsals for a performance, preparing a multi-ethnic group of teenager high school students for a performance
    Female artist in dhuku headscarf working in art studio — Stock Photo
    Female artist in dhuku headscarf working in art studio
    Front view of a multi-ethnic group of teenage school pupils and their Caucasian male teacher standing in a classroom looking at laptop computers together, the pupils listening while the teacher talks — Stock Photo
    Front view of a multi-ethnic group of teenage school pupils and their Caucasian male teacher standing in a classroom looking at laptop computers together, the pupils listening while the teacher talks
    Male community college instructor leading lesson in classroom — Stock Photo
    Male community college instructor leading lesson in classroom
    Side view of crop male doctor in blue uniform and gloves writing on flip chart while explaining theory during lesson in dentistry course — Stock Photo
    Side view of crop male doctor in blue uniform and gloves writing on flip chart while explaining theory during lesson in dentistry course
    Fashion designers using sewing machine — Stock Photo
    Fashion designers using sewing machine
    High school teacher supervising students taking exam at desks — Stock Photo
    High school teacher supervising students taking exam at desks
    Ethnic woman with documents reading data from laptop during studies at home — Stock Photo
    Ethnic woman with documents reading data from laptop during studies at home
    Focused woman with dark hair messaging on cellphone while being — Stock Photo
    Focused woman with dark hair messaging on cellphone while being
    Positive young female freelancer in casual clothes sitting with legs crossed on bed and typing on laptop while working on remote project at home — Stock Photo
    Positive young female freelancer in casual clothes sitting with legs crossed on bed and typing on laptop while working on remote project at home
    Male teacher leading lesson at projection screen in classroom — Stock Photo
    Male teacher leading lesson at projection screen in classroom
    Pharmaceutical businessman explaining medication at podium at conference — Stock Photo
    Pharmaceutical businessman explaining medication at podium at conference
    Male community college instructor at projection screen in classroom — Stock Photo
    Male community college instructor at projection screen in classroom
    High school teacher supervising students taking exam at desks — Stock Photo
    High school teacher supervising students taking exam at desks