Portrait of an Indian man in a library. Elderly professor or teacher with moustache is pleased with the research he has done in front of a book shelf. Learning and education in the senior years - Clips & vidéo de stock

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.

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.

Portrait of old Caucasian bald man in motley shirt looking to camera and smiling in library. Close up of male professor or cheerful worker of bibliotheca. Books shelves behind. Senior smiled teacher.

Portrait of old Caucasian bald man turning face to camera and smiling in library. Close up of male professor or cheerful worker of bibliotheca. Books shelves on background. Senior smiled teacher.

Mature writer working on essay, writing and throwing out paper, lack of ideas

Senior professor teaching online, giving lecture via webcam, distant education

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.

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.

Senior male librarian laughing inside a library with bookshelves in the background. Portrait of a stylish and trendy mature bookstore owner. Face of a college professor looking cheerful and friendly.

Portrait of a young university student standing in front of a library bookshelf. Caucasian female ready to do academic research for a thesis report and read literature for a successful education.

Closeup headshot of young woman showing a content facial expression in school library or community centre. Portrait of funky, cool student or teacher smiling. Passionate about education and learning.

Portrait of a beautiful African woman with a curly afro standing in a library. Serious black lawyer or librarian standing by bookshelf and looking confident. Trendy entrepreneur studying part time.