Math tools for the second grade:

1, two thick little math books (paper is scratch-proof)

2. A new set of triangular rulers

3. 10 bundle of sticks, each bundle 10. (*** 100)

4. Learn clocks and watches

5, the angle of activity (the angle of children's learning, the abstract two sides are lines, not too thick, you can do it yourself, the thinner two sides, one end is fixed, you can rotate, you can)

Activity angle has two meanings.

1. The activity corner is a place where everyone can find a place to play some games together. Usually it is the corner position of the classroom, which is more suitable; For example, the role-playing activity corner in kindergarten and the English corner where students on campus communicate in English.

2. Movable protractor: A protractor is an instrument used to measure angles. The goniometer can draw angles, angles, vertical lines and parallel lines, measure inclination and verticality levelness, and can be used as an internal and external right-angle crutch for opening and closing, and can also be used as a long and short ruler for intuitive and accurate reading, so as to draw a round inch with a specified size.

Protractor function

The protractor can draw angles, measure angles, draw vertical lines and parallel lines, and measure inclination, verticality and levelness. It can be opened and closed as an internal and external right-angle crutch, and can be used as a long and short ruler, which can be visually read out more accurately and draw a round inch with a specified size.

The invention has the advantages of wide source of manufacturing materials, low cost, simple structure, convenient manufacturing, strong practicability, large application market and great investment benefit of docking manufacturers. In order to make up for the single use of the horn and the inconvenience of carrying and keeping it,

Generally, one device is used for multiple purposes, which makes the horn flexible, comprehensive and practical, simple in structure, novel and unique in shape and reasonable in design, thus improving work efficiency and embodying social benefits.

Knowledge expansion

The preliminary understanding of angle belongs to the knowledge of space and graphics. Students learn on the basis of knowing rectangles, squares and parallelograms, which is somewhat abstract for junior students. In particular, it is difficult to verify whether an angle is a right angle.