good ideal in class

The atmosphere of learning in the ideal class
Weather in the class should feel cool due to make a comfortable both students and lecturers, if no one is expected to use a window air conditioner for the heat inside out through the window, the way professors teach is not too fast so it can be understood by students and do not be too tense and serious in teaching, students are sometimes more comfortable if the lecturers teaching with not too serious,

thanks,,