Magnet is one of the primary teaching for teaching experiments and presentations (elementary science experiments, middle school physics experiment), a teaching tool. Can also be used for school stationery, toys and other ... It allows students an intuitive feel to real changes in the magnetic field and vivid expression of its physical characteristics, more can arouse the students ' interest in learning, their concentration, stimulates their thinking and imagination. To the primary and secondary school students and children's understanding of magnetic fields and cognition are of great help and promote. Magnetic field beneficial to the human body, children may also make use of magnets N;S with Earth's magnetic field is repulsive, principle of opposites,

These magnets are used in the teaching of physical experiment can make students feel the presence of magnetic field visually, nature---repulsive magnets, opposites attract. can mobilize the initiative of students, to create a good atmosphere for learning, thereby greatly improving the quality of teaching it! magnet provides a constant magnetic field, and is an indispensable auxiliary aids physics electricity magnetism!