Elementary school kids raising hands to teacher in class

teaching teacher classroom elementary student education elementary school volunteer child multi-ethnic group learning student young women pre-adolescent child young adult day usa three quarter length smiling listening selective focus hand raised communication school building people women cheerful indoors asian sitting 4k childhood human arm focus on foreground schoolgirl answering 20-29 years millennial happiness sitting on ground medium group chair concentration girls caucasian schoolboy handheld boys adult sunlight close-up indian human limb body part limb rear view front view