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    Senior patient undergoing heart ultrasound scanning by female doctor. — Stock Photo
    Senior patient undergoing heart ultrasound scanning by female doctor.
    Female teacher and students conducting scientific experiment in laboratory classroom — Stock Photo
    Female teacher and students conducting scientific experiment in laboratory classroom
    Front view of a multi-ethnic group of teenage male and female choristers holding sheet music and singing standing on the stage of a school theatre during rehearsals for a performance, with the arm of the female conductor in the foreground — Stock Photo
    Front view of a multi-ethnic group of teenage male and female choristers holding sheet music and singing standing on the stage of a school theatre during rehearsals for a performance, with the arm of the female conductor in the foreground
    Girl students conducting scientific experiment, examining liquid in beaker in laboratory classroom — Stock Photo
    Girl students conducting scientific experiment, examining liquid in beaker in laboratory classroom
    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
    Curious students watching chemical reaction, conducting scientific experiment in laboratory classroom — Stock Photo
    Curious students watching chemical reaction, conducting scientific experiment in laboratory classroom
    College students conducting scientific experiment in science laboratory classroom — Stock Photo
    College students conducting scientific experiment in science laboratory classroom
    Side view close up of a Caucasian female conductor directing a group of teenage male and female choristers holding sheet music and singing standing on the stage of a school theatre during rehearsals for a performance — Stock Photo
    Side view close up of a Caucasian female conductor directing a group of teenage male and female choristers holding sheet music and singing standing on the stage of a school theatre during rehearsals for a performance
    Curious students examining liquid in beaker, conducting scientific experiment in laboratory classroom — Stock Photo
    Curious students examining liquid in beaker, conducting scientific experiment in laboratory classroom
    Rear view of a Caucasian teenage boy standing in the auditorium directing a teenage girl on stage in an empty school theatre during rehearsals for a performance — Stock Photo
    Rear view of a Caucasian teenage boy standing in the auditorium directing a teenage girl on stage in an empty school theatre during rehearsals for a performance
    Surprised students conducting scientific experiment, watching chemical reaction in classroom laboratory — Stock Photo
    Surprised students conducting scientific experiment, watching chemical reaction in classroom laboratory
    Scientist in clean suit conducting scientific experiment in laboratory — Stock Photo
    Scientist in clean suit conducting scientific experiment in laboratory
    Students examining liquid in test tube, conducting scientific experiment in laboratory classroom — Stock Photo
    Students examining liquid in test tube, conducting scientific experiment in laboratory classroom
    Young boy conducting a science experiment dressed in lab coat — Stock Photo
    Young boy conducting a science experiment dressed in lab coat
    Boy student using microscope, conducting scientific experiment in laboratory classroom — Stock Photo
    Boy student using microscope, conducting scientific experiment in laboratory classroom
    Side view of a Caucasian female conductor and a multi-ethnic group of teenage male and female choristers standing opposite, singing on the stage of a school theatre during rehearsals for a performance — Stock Photo
    Side view of a Caucasian female conductor and a multi-ethnic group of teenage male and female choristers standing opposite, singing on the stage of a school theatre during rehearsals for a performance
    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
    Focused boy students using digital tablet and microscope, conducting scientific experiment in laboratory classroom — Stock Photo
    Focused boy students using digital tablet and microscope, conducting scientific experiment in laboratory classroom
    College students conducting scientific experiment in science laboratory classroom — Stock Photo
    College students conducting scientific experiment in science laboratory classroom
    Curious students conducting scientific experiment, watching liquid in vial in laboratory classroom — Stock Photo
    Curious students conducting scientific experiment, watching liquid in vial in laboratory classroom
    View of conductor leading orchestra — Stock Photo
    View of conductor leading orchestra
    Girl student conducting scientific experiment in laboratory classroom — Stock Photo
    Girl student conducting scientific experiment in laboratory classroom
    Senior patient undergoing heart ultrasound scanning by female doctor. — Stock Photo
    Senior patient undergoing heart ultrasound scanning by female doctor.
    Female college students conducting scientific experiment in science laboratory classroom — Stock Photo
    Female college students conducting scientific experiment in science laboratory classroom
    Girl student using microscope, conducting scientific experiment in laboratory classroom — Stock Photo
    Girl student using microscope, conducting scientific experiment in laboratory classroom
    Girl students using microscope, conducting scientific experiment in laboratory classroom — Stock Photo
    Girl students using microscope, conducting scientific experiment in laboratory classroom
    View of Conductor leading orchestra — Stock Photo
    View of Conductor leading orchestra
    Science professor helping college student conducting scientific experiment in science laboratory classroom — Stock Photo
    Science professor helping college student conducting scientific experiment in science laboratory classroom
    Boy students conducting scientific experiment, examining liquid in test tube in laboratory classroom — Stock Photo
    Boy students conducting scientific experiment, examining liquid in test tube in laboratory classroom
    Side view of school aged boy learning from teacher conducting cl — Stock Photo
    Side view of school aged boy learning from teacher conducting cl
    Surprised students conducting exploding foam scientific experiment in classroom laboratory — Stock Photo
    Surprised students conducting exploding foam scientific experiment in classroom laboratory
    Boy students examining liquid in test tube, conducting scientific experiment in laboratory classroom — Stock Photo
    Boy students examining liquid in test tube, conducting scientific experiment in laboratory classroom
    Girl student examining pink liquid, conducting scientific experiment in laboratory classroom — Stock Photo
    Girl student examining pink liquid, conducting scientific experiment in laboratory classroom
    Girl students using microscope, conducting scientific experiment in laboratory classroom — Stock Photo
    Girl students using microscope, conducting scientific experiment in laboratory classroom
    Rear view of a Caucasian woman conductor directing a multi-ethnic group of teenage male and female choristers holding sheet music and singing standing on the stage of a school theatre during rehearsals for a performance — Stock Photo
    Rear view of a Caucasian woman conductor directing a multi-ethnic group of teenage male and female choristers holding sheet music and singing standing on the stage of a school theatre during rehearsals for a performance
    Male teacher and smiling girl student conducting scientific experiment at microscope in laboratory classroom — Stock Photo
    Male teacher and smiling girl student conducting scientific experiment at microscope in laboratory classroom
    Girl student using microscope, conducting scientific experiment in laboratory classroom — Stock Photo
    Girl student using microscope, conducting scientific experiment in laboratory classroom
    Male teacher and students conducting scientific experiment in laboratory classroom — Stock Photo
    Male teacher and students conducting scientific experiment in laboratory classroom
    Curious girl students conducting scientific experiment in laboratory classroom — Stock Photo
    Curious girl students conducting scientific experiment in laboratory classroom
    Students watching chemical reaction, conducting scientific experiment in laboratory classroom — Stock Photo
    Students watching chemical reaction, conducting scientific experiment in laboratory classroom
    Smiling male science teacher helping girl students conducting scientific experiment at microscope in laboratory — Stock Photo
    Smiling male science teacher helping girl students conducting scientific experiment at microscope in laboratory
    Surprised students conducting exploding foam scientific experiment in classroom laboratory — Stock Photo
    Surprised students conducting exploding foam scientific experiment in classroom laboratory
    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
    Girl students conducting chemistry experiment in classroom laboratory — Stock Photo
    Girl students conducting chemistry experiment in classroom laboratory
    College students conducting scientific experiment at microscope in science laboratory classroom — Stock Photo
    College students conducting scientific experiment at microscope in science laboratory classroom
    Smiling female chemistry teacher and students conducting scientific experiment in laboratory classroom — Stock Photo
    Smiling female chemistry teacher and students conducting scientific experiment in laboratory classroom
    Male teacher and boy student conducting scientific experiment in laboratory classroom — Stock Photo
    Male teacher and boy student conducting scientific experiment in laboratory classroom
    Male teacher helping girl student using microscope, conducting scientific experiment in laboratory classroom — Stock Photo
    Male teacher helping girl student using microscope, conducting scientific experiment in laboratory classroom
    Male science teacher and students conducting scientific experiment in laboratory classroom — Stock Photo
    Male science teacher and students conducting scientific experiment in laboratory classroom
    College students conducting scientific experiment in science laboratory classroom — Stock Photo
    College students conducting scientific experiment in science laboratory classroom
    Over the shoulder view of a Caucasian female conductor and a multi-ethnic group of teenage male and female choristers standing opposite each other, the choir holding sheet music and singing — Stock Photo
    Over the shoulder view of a Caucasian female conductor and a multi-ethnic group of teenage male and female choristers standing opposite each other, the choir holding sheet music and singing
    Smiling girl students examining liquid in test tube, conducting scientific experiment in laboratory classroom — Stock Photo
    Smiling girl students examining liquid in test tube, conducting scientific experiment in laboratory classroom
    Surprised students conducting exploding foam scientific experiment in classroom laboratory — Stock Photo
    Surprised students conducting exploding foam scientific experiment in classroom laboratory
    Orchestra conductor looking at empty seats — Stock Photo
    Orchestra conductor looking at empty seats
    Students conducting scientific experiment in laboratory classroom — Stock Photo
    Students conducting scientific experiment in laboratory classroom
    Male college student conducting scientific experiment using pipette in science laboratory classroom — Stock Photo
    Male college student conducting scientific experiment using pipette in science laboratory classroom
    Boy students examining liquid in test tube, conducting scientific experiment in laboratory classroom — Stock Photo
    Boy students examining liquid in test tube, conducting scientific experiment in laboratory classroom
    Side view of school aged boy learning from teacher conducting cl — Stock Photo
    Side view of school aged boy learning from teacher conducting cl
    Side view of school aged boy learning from teacher conducting cl — Stock Photo
    Side view of school aged boy learning from teacher conducting cl
    Surprised students conducting exploding foam scientific experiment in classroom laboratory — Stock Photo
    Surprised students conducting exploding foam scientific experiment in classroom laboratory