Due giovani studenti maschi e femmine che scrivono sulla lavagna bianca durante una lezione di matematica. - Foto e immagini stock

Two young male and female students writing on the white chalkboard during a math class.

Two young male and female students writing on the white chalkboard during a math class.

Two young male and female students writing on the white chalkboard during a math class.

Two young male and female students writing on the white chalkboard during a math class.

Two young male and female students writing on the white chalkboard during a math class.

Two young male and female students writing on the white chalkboard during a math class.

Two young male and female students writing on the white chalkboard during a math class.

Two young male and female students writing on the white chalkboard during a math class.

Within the heavy industry, a factory industrial engineer measures with a caliper and on a personal computer Designs a 3D model. High quality photo

Within the heavy industry, a factory industrial engineer measures with a caliper and on a personal computer Designs a 3D model. High quality photo

Group of a young business people discussing business plan at modern startup office building

Group of Casual businessmen working on a desktop computer in modern open plan startup office interior. Selective focus. High-quality photo

Group of a young business people discussing business plan at modern startup office building

Young female student standing and writing on white chalkboard in a classroom

Group of young students doing technical vocational practice with teacher in the electronic classroom, Education and technology concept

Technology students group in computer lab school classroom working on

Within the heavy industry, a factory industrial engineer measures with a caliper and on a personal computer Designs a 3D model. High quality photo