Talk about how to grasp the teaching of three-dimensional geometry

One, keep in mind what the textbook says.

Two, the little examples and exercises at the back of textbook texts must be emphasized. They are the bridge and teacher to the solution of difficult problems.

Three, more use of objects and graphic comparisons.

Four, use more three thin sticks and two pieces of cardboard as teaching aids.

V. Imagine and draw three-dimensional diagrams from multiple angles and directions. (As shown in the picture)