13341308 - Portrait male community college instructor in classroom13341270 - Students watching instructor leading lesson13341175 - Community college instructor helping students in classroom12635531 - Student Mechanical Drawing12584300 - Measuring the density of an object, illustration12584258 - Slingshot, illustration13341333 - Students watching instructor leading lesson13341316 - Community college instructor helping student at computer13341251 - Instructor and students in computer lab13341202 - Community college instructor helping students at desk13341183 - People talking in support group meeting circle12584281 - Earth orbiting the Sun, illustration12582976 - Pressure transmission in liquids, illustration13349967 - Father and daughter exercising on mat12584299 - Measuring the volume of an irregular object, illustration12582977 - Car disc brake system, illustration12419573 - Uses of mammalian tails, illustration13956566 - Father and son cleaning beach together13378432 - Father and daughter playing keyboard13349956 - Father and kids exercising in living room13341288 - Photography students with digital camera13341189 - Instructor helping student at computer in computer lab12584271 - Centripetal force and inertia, illustration12584276 - Centrifugal force, illustration13341211 - Female community college instructor leading lesson13340978 - Teacher helping students with homework in classroom13337961 - Senior woman and girl volunteer cleaning up litter13337943 - Father and son volunteers cleaning up litter12635532 - Teacher Showing Structural Bridge Model12584273 - Spin dryer mechanism, illustration12582962 - Pressure exerted by a sharp knife, illustration13349840 - Daughter watching mother exercise on treadmill13340970 - High school teacher helping students studying in classroom13338018 - Multi-generation family volunteers planting trees in park13337141 - Mother and daughter boxing12584272 - Centripetal force and inertia, illustration12582965 - Pressure exerted by finger pushing a nail into wood, illustr12582957 - Woman in high heels and elephant, illustration13349811 - Father and daughter exercising in living room12584301 - Measuring the density of an object, illustration12584275 - Centrifugal and centripetal forces, illustration12582975 - Pressure transmission in liquids, illustration13349839 - Mother and daughter exercising with dumbbells13341340 - People talking in support group meeting circle13341320 - Students watching instructor leading lesson13340991 - High school teacher helping students studying in classroom13337984 - Mother and son volunteers cleaning up litter13337255 - Mother and daughters boxing13337253 - Mother teaching daughter boxing12584293 - Truss bridge, illustration12584287 - Arch bridge, illustration12582980 - Demonstration of atmospheric pressure, illustration11712040 - Brain anatomy model13341221 - Students watching instructor leading lesson13337946 - Grandparent and granddaughter volunteers cleaning up litter12584282 - Earth orbiting the Sun, illustration12582973 - Drinking through a straw, illustration13349932 - Happy father and daughter high-fiving on yoga mat13337166 - Mother teaching daughters boxing12053098 - 3D printed anatomical hand model11712039 - Brain anatomy model13341335 - Instructor leading lesson at laptop and projection screen13341280 - People talking in support group meeting circle13337262 - Mother teaching daughter boxing12584292 - Truss bridge, illustration12584291 - Cantilever bridge, illustration13349880 - Boy watching mother exercise with dumbbells13341303 - Instructor helping student using computer12630275 - Zinc, Copper Sulphate Reaction, 2 of 212582963 - Pressure exerted by a sharp knife, illustration12582960 - Pressure exerted by stiletto heel and elephant's foot, illus13349954 - Playful father and daughter exercising13349901 - Mother and daughter exercising with dumbbells13349808 - Happy father and daughter exercising13341282 - Instructor helping students in computer lab13339959 - Father and son brushing teeth in campsite bathroom13337939 - Grandfather and granddaughter volunteers painting mural12630261 - Sulfuric acid and sugar, 2 of 512584297 - Measuring the volume of an irregular object, illustration12584286 - Arch bridge, illustration11708418 - Newton's cradle toy13341284 - Instructor talking with student at computer13341204 - Teacher helping community college student at desk12584285 - The Moon orbiting Earth, illustration12584279 - Centripetal force, illustration11712036 - Anatomical teaching model13349925 - Mother and kids exercising with dumbbells13349886 - Father and daughter exercising doing squats13341295 - Instructor helping students using computers13341286 - Smiling community college instructor leading lesson13341212 - Instructor helping student with paperwork13337925 - Senior woman and girl volunteer cleaning up litter12452089 - Grandfather and grandson using tablet12053099 - 3D printed anatomical lower spine model11708407 - Slinky spring12630274 - Zinc, Copper Sulphate Reaction, 1 of 212452087 - Grandfather and grandson using tablet11712045 - Anatomical teaching model11708409 - Slinky springpage suivante
