Lecturer standing in library in front of bookshelf with a friendly smile. Portrait of a happy young man in university confident about learning and education. Knowledge is key for a bright future. - Stock záběry a video

Portrait of a happy and intelligent male professor, researcher or author feeling confident with a big smile. University lecturer and literature professor standing in front of a library bookshelf.

Animation of Caucasian man standing with hands on hips then holding his head in pain, with bookshelves in a library in the background, digital composite

Portrait of a smiling Asian female student wearing a blue hijab studying in a library, looking at camera and wearing casual clothes, in slow motion

Animation of book week text over caucasian female student holding book in library. book week and reading concept digitally generated video.

Animation of clouds and markers moving over happy school children with books. children's book day, reading and education concept digitally generated video.

Animation of science school icons moving over male teacher and school children during lesson in background. Education back to school and schooling concept digital composite.

Portrait of a happy and intelligent male professor, researcher or author feeling confident with a big smile. University lecturer and literature professor standing in front of a library bookshelf.

Portrait of happy laughing business man looking joyful inside a bright room with copy space. Closeup of male entrepreneur standing alone in an empty office. Face of a cheerful adult with glasses.

Face portrait of stressed mature man feeling tired, overworked, suffering from burnout. Closeup headshot of frustrated, annoyed businessman standing alone in office and feeling angry while listening.

4k video footage of a young woman using a digital tablet at a convention center

4k video footage of a mature businessman using a digital tablet at a convention center

Portrait of one mature business woman with short hair smiling while standing in a restaurant alone. Face of happy white woman in front of blurred background looking kind and friendly.