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    Abstract male silhouette with visible lumbar spine, computer illustration. — Stock Photo
    Abstract male silhouette with visible lumbar spine, computer illustration.
    Smiling male teacher leading lesson in classroom — Stock Photo
    Smiling male teacher leading lesson in classroom
    Happy kid in goggles and cardboard wings raising hands during game on field in backlit — Stock Photo
    Happy kid in goggles and cardboard wings raising hands during game on field in backlit
    Schoolboy using digital tablet — Stock Photo
    Schoolboy using digital tablet
    Illustration of knee bones in human skeleton on blue background. — Stock Photo
    Illustration of knee bones in human skeleton on blue background.
    Illustration of human skeleton on blue background. — Stock Photo
    Illustration of human skeleton on blue background.
    Chinese schoolgirl with backpack looking in camera — Stock Photo
    Chinese schoolgirl with backpack looking in camera
    Close-up illustration of larynx in male body silhouette. — Stock Photo
    Close-up illustration of larynx in male body silhouette.
    Female upper body musculature, computer illustration. — Stock Photo
    Female upper body musculature, computer illustration.
    Portrait of enthusiastic junior high students and teachers cheering — Stock Photo
    Portrait of enthusiastic junior high students and teachers cheering
    Media students sitting in classroom — Stock Photo
    Media students sitting in classroom
    Crop man writing with pen in notebook — Stock Photo
    Crop man writing with pen in notebook
    Boy sitting at desk — Stock Photo
    Boy sitting at desk
    Happy teen jockeys in helmets riding obedient horses on sandy dressage arena during lesson in equestrian school — Stock Photo
    Happy teen jockeys in helmets riding obedient horses on sandy dressage arena during lesson in equestrian school
    Primary school girls in rural primary schools — Stock Photo
    Primary school girls in rural primary schools
    Transparent male silhouette with colored lungs, computer illustration. — Stock Photo
    Transparent male silhouette with colored lungs, computer illustration.
    Illustration of shoulder bones in human skeleton. — Stock Photo
    Illustration of shoulder bones in human skeleton.
    High angle of content Latin teen boy with Down syndrome browsing netbook while sitting at table and studying online from home — Stock Photo
    High angle of content Latin teen boy with Down syndrome browsing netbook while sitting at table and studying online from home
    Smiling, confident female community college journalism student behind microphone — Stock Photo
    Smiling, confident female community college journalism student behind microphone
    Caucasian female teacher wearing face mask with digital tablet teaching group of multi ethnic kids. Primary education social distancing health safety during Covid19 Coronavirus pandemic. — Stock Photo
    Caucasian female teacher wearing face mask with digital tablet teaching group of multi ethnic kids. Primary education social distancing health safety during Covid19 Coronavirus pandemic.
    Woman writing notes — Stock Photo
    Woman writing notes
    Confident, happy female instructor preparing in classroom — Stock Photo
    Confident, happy female instructor preparing in classroom
    Chef helping Down Syndrome students roll dough in kitchen — Stock Photo
    Chef helping Down Syndrome students roll dough in kitchen
    High angle back of unrecognizable mother helping daughter with homework while sitting at table with notebook and studying at home — Stock Photo
    High angle back of unrecognizable mother helping daughter with homework while sitting at table with notebook and studying at home
    Low angle view of library with sign — Stock Photo
    Low angle view of library with sign
    Close up of chemicals in beaker on table — Stock Photo
    Close up of chemicals in beaker on table
    A woman with an intense gaze works at desktop computer in dark room — Stock Photo
    A woman with an intense gaze works at desktop computer in dark room
    A mature Christian woman mentoring and having a bible study with a young woman in a coffee shop: Edmonton, Alberta, Canada — Stock Photo
    A mature Christian woman mentoring and having a bible study with a young woman in a coffee shop: Edmonton, Alberta, Canada
    Digital illustration of human alveoli on white background. — Stock Photo
    Digital illustration of human alveoli on white background.
    Female artist painting at easel in art class studio — Stock Photo
    Female artist painting at easel in art class studio
    Mid section view of female chef grating hard cheese on a grater. — Stock Photo
    Mid section view of female chef grating hard cheese on a grater.
    Female anatomy showing orange colored liver, computer illustration. — Stock Photo
    Female anatomy showing orange colored liver, computer illustration.
    Company of men learning during workshop — Stock Photo
    Company of men learning during workshop
    Portrait of caucasian girl sitting on her desk in the class at school. school and education concept — Stock Photo
    Portrait of caucasian girl sitting on her desk in the class at school. school and education concept
    Male skeleton hand with visible distal phalanges, computer illustration. — Stock Photo
    Male skeleton hand with visible distal phalanges, computer illustration.
    Overhead view of open laptop on bed. — Stock Photo
    Overhead view of open laptop on bed.
    From above unrecognizable young female with curly hair lying on bed reading book during weekend at home — Stock Photo
    From above unrecognizable young female with curly hair lying on bed reading book during weekend at home
    Group of multi ethnic kids wearing face masks performing yoga in the school garden. Primary education social distancing health safety during Covid19 Coronavirus pandemic. — Stock Photo
    Group of multi ethnic kids wearing face masks performing yoga in the school garden. Primary education social distancing health safety during Covid19 Coronavirus pandemic.
    A woman professor sits at her office desk smiling with direct gaze — Stock Photo
    A woman professor sits at her office desk smiling with direct gaze
    Mother reading book to elementary age daughter and son at bedtime. — Stock Photo
    Mother reading book to elementary age daughter and son at bedtime.
    Boy reading book on coffee table — Stock Photo
    Boy reading book on coffee table
    Mature woman listening to music in headphones and reading paper while sitting in armchair and doing remote job on laptop near window at home — Stock Photo
    Mature woman listening to music in headphones and reading paper while sitting in armchair and doing remote job on laptop near window at home
    Girl writing with a pen on a board — Stock Photo
    Girl writing with a pen on a board
    Young woman listening to music and using mobile phone while reading books at home — Stock Photo
    Young woman listening to music and using mobile phone while reading books at home
    Rural female teacher and pupils in the classroom — Stock Photo
    Rural female teacher and pupils in the classroom
    Medical illustration of visible spleen in human body. — Stock Photo
    Medical illustration of visible spleen in human body.
    Female silhouette with tumor in liver on blue background, computer illustration. — Stock Photo
    Female silhouette with tumor in liver on blue background, computer illustration.
    Side view of woman sitting on bed at home and reading book — Stock Photo
    Side view of woman sitting on bed at home and reading book
    Side view of teen boy jockey in helmet riding brown horse on dressage arena during training in equestrian school — Stock Photo
    Side view of teen boy jockey in helmet riding brown horse on dressage arena during training in equestrian school
    3d anatomical model showing internal organs in female anatomy, computer illustration. — Stock Photo
    3d anatomical model showing internal organs in female anatomy, computer illustration.
    Human brain cerebellum, digital illustration. — Stock Photo
    Human brain cerebellum, digital illustration.
    Illustration of ureter cancer in male body silhouette on black background. — Stock Photo
    Illustration of ureter cancer in male body silhouette on black background.
    Multi ethnic group of conservation volunteers cleaning up river in the countryside, man making notes holding clipboard. Ecology and social responsibility in rural environment. — Stock Photo
    Multi ethnic group of conservation volunteers cleaning up river in the countryside, man making notes holding clipboard. Ecology and social responsibility in rural environment.
    Male skeleton part with visible atlas vertebrae, computer illustration. — Stock Photo
    Male skeleton part with visible atlas vertebrae, computer illustration.
    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.
    Curious, smiling students watching chemical reaction, conducting scientific experiment in laboratory classroom — Stock Photo
    Curious, smiling students watching chemical reaction, conducting scientific experiment in laboratory classroom
    Two clay jugs — Stock Photo
    Two clay jugs
    Female Caucasian teacher teaching a Caucasian girl during the lesson. Primary education social distancing health safety during Covid19 Coronavirus pandemic. — Stock Photo
    Female Caucasian teacher teaching a Caucasian girl during the lesson. Primary education social distancing health safety during Covid19 Coronavirus pandemic.
    Children playing in an inner courtyard and painting with water paints — Stock Photo
    Children playing in an inner courtyard and painting with water paints
    High school teacher helping students studying in classroom — Stock Photo
    High school teacher helping students studying in classroom