4K African american teacher showing seedlings in classroom as boy giving bottle kids watching education learning demonstration 影视素材 African american teacher showing seedlings in classroom as boy giving bottle kids watching education learning demonstration 影视素材
4K Happy caucasian little girl child and woman teacher showing thumbs up in classroom approving lesson success learning happy 股票视频 Happy caucasian little girl child and woman teacher showing thumbs up in classroom approving lesson success learning happy 股票视频
4K Female teacher showing to female youth at lab bench reaching arranging green test tubes in rack classroom science mentorship 股票视频 Female teacher showing to female youth at lab bench reaching arranging green test tubes in rack classroom science mentorship 股票视频
4K Children watching african american woman teacher showing green test tube at lab bench observing children watching african american 股票视频 Children watching african american woman teacher showing green test tube at lab bench observing children watching african american 股票视频
4K African american teacher showing finger moves girl copying at desk with closed laptop learning african american teacher showing 股票视频 African american teacher showing finger moves girl copying at desk with closed laptop learning african american teacher showing 股票视频
4K Diverse class watching teacher showing plant at board misting sprouts learning plant care seedling fern magnifier classroom 股票录像 Diverse class watching teacher showing plant at board misting sprouts learning plant care seedling fern magnifier classroom 股票录像
4K Woman teacher showing sign while boy watching and copying for practice with laptop in classroom woman teacher showing sign while 股票录像 Woman teacher showing sign while boy watching and copying for practice with laptop in classroom woman teacher showing sign while 股票录像
4K African teacher showing hand shapes guiding youth blond boy practicing signs in class on laptop african teacher showing hand 股票视频 African teacher showing hand shapes guiding youth blond boy practicing signs in class on laptop african teacher showing hand 股票视频
登录 
