With the growth of age and cognition, children in kindergarten classes are more and more fond of playing and operating, and can carry out simple activities such as comparison, classification, measurement and judgment, especially interested in the weight of different objects in their surrounding lives, and like to try to compare and find their differences. In view of this feature, I designed a mathematical activity-comparing weights, aiming to let children learn to compare the weight of objects by natural measurement, judge the weight of objects by visual inspection, hand holding and other methods, and develop children's perception and judgment ability.

moving target

1. Learn to compare the weight of objects with natural measurement methods such as weighing, testing and ratio.

2. In the process of exploration, we can correctly judge and express the weight of objects in words.

3. Experience the pleasure and success of comparing the weight of objects in various ways.

Important and difficult

Teaching emphasis: learn to compare the weight of objects with natural measurement methods such as weighing, trial and comparison, and experience the pleasure and success of comparing the weight of objects with various methods.

Teaching difficulties: In the learning process, we can master various comparison methods, correctly judge and express the weight of objects in words.

Activities to be prepared

1. One stuffed pig, one stuffed rabbit and one stuffed dog; Medium-sized seesaw; Related computer courseware.

2. Everyone has a study basket, which contains two wooden building blocks of different sizes, two glass balls of the same size, a cotton ball, a small magnet, two identical cups and a proper amount of water.

Activity process

1. scene import.

Use seesaws and plush toys to create an animal park and demonstrate it. Inspire children to compare the weight of small animals through visual judgment, and tell who is the heaviest, the lightest and the neither heavy nor light among several small animals.

2. Explore all kinds of materials.

Guide children to make full use of learning tools to operate, feel the weight of different objects and learn to compare the weight of objects.

(1) Choose two items at random, and feel that some items are light and some items are heavy.

(2) Comparing wooden building blocks of different sizes, we know that big building blocks are heavy and small building blocks are light.

(3) Compare the weight of glass balls with the same size.

(4) It is found that cotton balls of the same size are light and glass balls are heavy.

(5) Comparing the big cotton ball with the small magnet, the child feels strangely that the big cotton ball is light and the small magnet is heavy.

3. Application in life.

Provide children with two identical cups to stimulate their learning initiative and creative thinking.