This is a two-dimensional four-quadrant diagram. The two ends of the horizontal axis are called love and fear, and the two ends of the vertical axis are called past and future. It's called love-hate coordinate system. The first quadrant represents the past love, and its name is nostalgia.

The second quadrant is called fear of the past, which is usually called suffering; The third quadrant, the love for the future, is what we yearn for; The fourth quadrant is called fear of the future, which is anxiety.

Behind quadrant

Two number axes perpendicular to each other on the same plane and having a common origin form a plane rectangular coordinate system, which has two coordinate axes, of which the horizontal axis is the X axis and the right direction is the positive direction, representing the teaching goal; The vertical axis is the Y axis and the orientation is the positive direction, which represents the classroom atmosphere or teacher-student interaction.

The plane where the coordinate system is located is called the coordinate plane, and the common origin of the two coordinate axes is called the origin of the plane rectangular coordinate system. X axis and Y axis divide the coordinate plane into four quadrants, and the upper right part is called the first quadrant, which represents students. The other three parts are called counterclockwise in turn: the second quadrant, representing teachers; The third quadrant represents the teaching method; The fourth quadrant represents the teaching content.