In order to better explore corn, the kindergarten provided us with a lot of inquiry materials, including long corn stalks. The first reaction of children when they see corn stalks is that this thing is so high! So, I had a good idea. It would be very interesting if the corn stalks were cleaned and made into rulers, and the sizes of things were measured in the classroom. In the activity area, the children measured the desks, chairs, cabinets, heights and even lengths of the classroom with a "corn ruler" and obtained interesting results. In this "corn ruler" activity, I mainly have the following gains and reflections.

First, seize children's interest and guide them to learn.

It is pointed out in the outline that "educational content should be close to children's lives, and choosing things and problems that children are interested in will help expand children's experience and vision." Children are very interested in the tall corn stalk, especially its height. So how can children express the height of corn stalk vividly on the basis of not mastering the length and quantity unit well? There are tall and short things, long and short things in the classroom. It is better to use corn stalk as a ruler and compare it with what the teachers say, so as to know who is long and who is short. Such activities can cultivate children's interest in measurement, try to measure the surrounding objects with tools, and further understand the application of measurement in life.

Second, give children enough space to explore independently.

1. In fact, besides corn stalks, the measuring tools we provide should be richer and more creative. Such as: corncob, dried corn, corn kernels, peanuts, wool, etc. In the activity, children choose their own measuring tools from the information area, measure the items they are interested in, and make a comparative observation. At the same time, the selection range of the measured object can be wider. Not only indoor measuring tables, cabinets, beds, etc. And it also extends to the outside. Such as measuring slides, sand pools, balance beams and so on. Measure the height difference of holly, pomegranate and other trees, and choose a tool between peers to measure each other's height. For example, the teacher's pointer only needs 5 corn cobs to measure the same item, but it needs 30 peanuts to measure it; When measuring the table with corncob, it is obvious that the table is long, but when measuring the rice straw, the table becomes short, and so on. In the process of inquiry, children not only gain knowledge, but also gradually form the consciousness of solving problems independently and the spirit of being brave in exploration.

Corn stalk can not only be used as a "ruler" for measuring and comparing activities in the information area, but also be used as a natural material in the building area together with branches and building blocks. However, like our branches, the length of corn stalks should be different, so that in the process of building, children can integrate mathematical consciousness into the building activities without training spatial thinking, and naturally compare the different lengths of corn stalks.

A simple corn is also a rich classroom.