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    Instructor demonstrating air conditioner control system on demo board to students in HVAC classroom one student in wheelchair — Stock Photo
    Instructor demonstrating air conditioner control system on demo board to students in HVAC classroom one student in wheelchair
    Professor discussing sensors and thermostats with students in an HVAC classroom — Stock Photo
    Professor discussing sensors and thermostats with students in an HVAC classroom
    Instructor assisting pole dancer with correct pose in fitness studio — Stock Photo
    Instructor assisting pole dancer with correct pose in fitness studio
    Cute little boy having fun with swimming instructor in swimming pool. — Stock Photo
    Cute little boy having fun with swimming instructor in swimming pool.
    Teenage tennis player training with male coach on tennis court. — Stock Photo
    Teenage tennis player training with male coach on tennis court.
    Full body of young barefooted female beginner standing on mat on grassy lawn and doing Trikonasana pose while practicing yoga in green park with help of ethnic personal trainer — Stock Photo
    Full body of young barefooted female beginner standing on mat on grassy lawn and doing Trikonasana pose while practicing yoga in green park with help of ethnic personal trainer
    Full body side view of calm slim females doing Extended Childs pose while stretching body and relaxing during yoga class together in fitness studio — Stock Photo
    Full body side view of calm slim females doing Extended Childs pose while stretching body and relaxing during yoga class together in fitness studio
    Cheerful woman stretching leg on blue hammock for aerial yoga on wooden stage — Stock Photo
    Cheerful woman stretching leg on blue hammock for aerial yoga on wooden stage
    Dance instructor helping teenage girl student stretch in dance class — Stock Photo
    Dance instructor helping teenage girl student stretch in dance class
    Boy with board splashing in swimming class with instructor in public pool. — Stock Photo
    Boy with board splashing in swimming class with instructor in public pool.
    Sportive bearded male training on tranquil idyllic meadow and doing yoga asana against blue sky — Stock Photo
    Sportive bearded male training on tranquil idyllic meadow and doing yoga asana against blue sky
    Fitness instructor leading aerobics class — Stock Photo
    Fitness instructor leading aerobics class
    High school teacher supervising students taking exam at desks — Stock Photo
    High school teacher supervising students taking exam at desks
    African american male fitness instructor using tablet, with colleague exercising outdoors. healthy active lifestyle, cross training for fitness. — Stock Photo
    African american male fitness instructor using tablet, with colleague exercising outdoors. healthy active lifestyle, cross training for fitness.
    Elementary age boys in taekwondo class with trainer. — Stock Photo
    Elementary age boys in taekwondo class with trainer.
    Tennis instructor training teenage girl on tennis court. — Stock Photo
    Tennis instructor training teenage girl on tennis court.
    Serene active seniors practicing yoga in circle — Stock Photo
    Serene active seniors practicing yoga in circle
    Female volleyball coach tying volleyball net on the beach — Stock Photo
    Female volleyball coach tying volleyball net on the beach
    Community college instructor helping students with paperwork in classroom — Stock Photo
    Community college instructor helping students with paperwork in classroom
    Active seniors exercising in circle, using straps to stretch legs — Stock Photo
    Active seniors exercising in circle, using straps to stretch legs
    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
    Student with Down Syndrome placing bread box in oven — Stock Photo
    Student with Down Syndrome placing bread box in oven
    Young asian women doing stretching outdoors — Stock Photo
    Young asian women doing stretching outdoors
    Boy learning rollerskating with grandfather on road with cones. — Stock Photo
    Boy learning rollerskating with grandfather on road with cones.
    Young male student with Down Syndrome baking in kitchen — Stock Photo
    Young male student with Down Syndrome baking in kitchen
    Female trainer helping flexible male doing yoga standing in Triangle pose at home — Stock Photo
    Female trainer helping flexible male doing yoga standing in Triangle pose at home
    Young asian woman doing stretching exercises — Stock Photo
    Young asian woman doing stretching exercises
    Trainer assisting senior women in performing yoga at yoga center — Stock Photo
    Trainer assisting senior women in performing yoga at yoga center
    Trainer assisting women in practicing yoga at fitness studio. — Stock Photo
    Trainer assisting women in practicing yoga at fitness studio.
    Adult trainer helping unrecognizable female standing in Urdhva Dhanurasana pose while practicing yoga in summer park — Stock Photo
    Adult trainer helping unrecognizable female standing in Urdhva Dhanurasana pose while practicing yoga in summer park
    Young asian woman doing yoga exercise on mat, prayer twist pose — Stock Photo
    Young asian woman doing yoga exercise on mat, prayer twist pose
    Mid section of female trainer putting hand wrap to female boxer in boxing club. Strong female fighter in boxing gym training hard. — Stock Photo
    Mid section of female trainer putting hand wrap to female boxer in boxing club. Strong female fighter in boxing gym training hard.
    Chef teacher photographing students with camera phone in cooking class kitchen — Stock Photo
    Chef teacher photographing students with camera phone in cooking class kitchen
    Fit men training over obstacle course at boot camp — Stock Photo
    Fit men training over obstacle course at boot camp
    Female paramedic and instructor CPR training on dummy outdoors. — Stock Photo
    Female paramedic and instructor CPR training on dummy outdoors.
    Trainer assisting senior women in performing yoga at yoga center — Stock Photo
    Trainer assisting senior women in performing yoga at yoga center
    Happy surfer couple dressed in wetsuits walking with surfboards on the coast of sandy beach looking at each other — Stock Photo
    Happy surfer couple dressed in wetsuits walking with surfboards on the coast of sandy beach looking at each other
    Swimming instructor with children using kicking boards in swimming pool. — Stock Photo
    Swimming instructor with children using kicking boards in swimming pool.
    Taekwondo instructor training little boy in class. — Stock Photo
    Taekwondo instructor training little boy in class.
    Man practicing yoga in Downward Facing Dog pose with help of female instructor during session at home — Stock Photo
    Man practicing yoga in Downward Facing Dog pose with help of female instructor during session at home
    Preschooler boy in ski goggles having skiing lesson. — Stock Photo
    Preschooler boy in ski goggles having skiing lesson.
    Instructor training students about air conditioning units in HVAC classroom — Stock Photo
    Instructor training students about air conditioning units in HVAC classroom
    Male instructor leading dance class in studio — Stock Photo
    Male instructor leading dance class in studio
    Smiling mature female community college instructor at laptop preparing in classroom — Stock Photo
    Smiling mature female community college instructor at laptop preparing in classroom
    Male instructor leading lesson at projection screen in classroom — Stock Photo
    Male instructor leading lesson at projection screen in classroom
    Personal trainer helping client in gym — Stock Photo
    Personal trainer helping client in gym
    Yoga instructor in activewear sitting in lotus position while people lying on mats on ground during Shavasana in park in sunny day — Stock Photo
    Yoga instructor in activewear sitting in lotus position while people lying on mats on ground during Shavasana in park in sunny day
    Flexible female stretching legs with help of personal instructor while doing exercises on pilates reformer — Stock Photo
    Flexible female stretching legs with help of personal instructor while doing exercises on pilates reformer
    Man training his dog in the snow and play with a ball — Stock Photo
    Man training his dog in the snow and play with a ball
    Hands of physical therapist performing skinfold test to measuring teenage boy body fat. — Stock Photo
    Hands of physical therapist performing skinfold test to measuring teenage boy body fat.
    Young barefoot female trainer standing on tiptoes while helping female athlete performing Transition Up Pole pose during class — Stock Photo
    Young barefoot female trainer standing on tiptoes while helping female athlete performing Transition Up Pole pose during class
    Trainer helping woman with exercise — Stock Photo
    Trainer helping woman with exercise
    Chef teaching students with Down Syndrome how to bake in kitchen — Stock Photo
    Chef teaching students with Down Syndrome how to bake in kitchen
    Concentrated female trainer in sportswear teaching man meditating posture pose during yoga session in studio — Stock Photo
    Concentrated female trainer in sportswear teaching man meditating posture pose during yoga session in studio
    Female photography instructor helping student at computer in classroom — Stock Photo
    Female photography instructor helping student at computer in classroom
    Side view of strong female alpinist climbing wall in bouldering club under supervision of male instructor — Stock Photo
    Side view of strong female alpinist climbing wall in bouldering club under supervision of male instructor
    Side view of boxer man punching gloves of trainer in the gym. — Stock Photo
    Side view of boxer man punching gloves of trainer in the gym.
    Male trainer assisting female boxer in fitness studio — Stock Photo
    Male trainer assisting female boxer in fitness studio
    Friends preparing zip line equipment — Stock Photo
    Friends preparing zip line equipment
    Coach assisting a woman while practicing pilates in fitness studio — Stock Photo
    Coach assisting a woman while practicing pilates in fitness studio