Una explicación detallada. Joven profesor universitario está ocupado explicando la conferencia que ha dado - Foto e imágenes de stock

Time for answer. Young attractive college professor points out at the student who wants to answer the question

Quick quiz. Lecturer turns around and asks a few simple questions to all the students

Enthusiastic Teacher Explains Lessons and Asks Questions from a Classroom Full of Bright Diverse Children. In Elementary School Group of Smart Multiethnic Kids Learning Science and Creative Thinking

Lecture in progress. Nice-looking intelligent lecturer is writing math formulas

Desire to answer. Female young student in a group raises her arm in order to answer the question

Lesson in progress. Young female teacher is looking down at her textbook and checking her pupils presence

Enjoying learning. Happy smiling girl doing sums near the school board with the help of her teacher.

Counting in class. Smart school girl speaking and writing on a board in front oh the class.

Writing for everyone. Attractive female teacher is busy writing on the whiteboard during the lesson

Be first. Little pupils raising their hands during classes and teacher explaining new material

Sea of hands. Sea of raised hands of little pupils during classes and happy teacher

In the school. Young female teacher is looking at her pupils while they all raising their hands in the air