Oříznutý pohled rozmazaného učitele psaní matematické rovnice, nápis - Stock fotografie a obrázky

Blurred teacher writing mathematic formula on chalkboard

Teacher or student writing on blackboard during math lesson in school classroom.

Girl writing on a chalkboard

Hand of a student working on complex equation

Female student working on mathematics problem on blackboard

Cropped view of teacher with chalk writing mathematic formula on chalkboard

Cropped view of teacher writing equation on chalkboard, banner

Cropped view of teacher pointing with finger at globe

Preteen boy writing on notebook near father and laptop at home

Smiling kindergarten teacher looking at blurred toddler kid with down syndrome drawing with preschooler girl

High angle view of cheerful schoolboy and schoolgirls sitting with notebooks while drawing on white

Young african american mom looking at camera near child drawing on notebook and globe on carpet

African american child holding notebook near mother with backpack in living room