Look at these female teachers who are shaking with laughter. And this state basically lasted for the whole report. You may say he is handsome, but he is not. Do not believe, look!
So what attracts everyone? This is his panoramic mathematics. What is Panoramic Mathematics? I don't know, either. I know, but it can't be said in a few words. But it has magical power. More octopus-like tentacles and suckers grow in teacher Zhang's class, generating more and stronger suction, making children fall in love with mathematics, learning and then the world.
He told students that there are three magic weapons in learning, namely, guessing, guessing and guessing. Mathematics is a process of constantly guessing, verifying and looking for laws.
He taught Mobius circle and topology to the second grade students of primary school, which was only learned by universities and graduate students in mathematics. Don't be afraid, he has a clear mind, and he also takes his students to do, guess and verify together. It's really simple. Coupled with teacher Zhang's passion and childlike innocence (can be described as walking expression packs), students feel that they are playing.
He asked the students to post it first, and then asked them to name the circle themselves. In the end, everyone called it "Zhengquan", and he suggested that everyone wear it as "the crown of mathematics". Then cut a small mouth and look at the students through it. Let the students guess how many circles they will cut. The children are scrambling to guess. Then let the children follow their own hands to test the guess. The result is two independent circles. Then he asked, "You can post it now. How can you persist? " The children froze. Teacher Zhang suggested: "Since you can post it now, of course you can post it backwards." So guide the children to stick back. This circle is also called "anti-circle" Teacher Zhang cut another hole. Let's guess: "How many circles will you cut this time?" Students guess two and three. Finally, Teacher Zhang suggested that the teacher guess. As a result, the teacher didn't dare to guess at first, but later he guessed two or three. Finally, teacher Zhang took everyone to cut it open and turned it into a big circle. After the students cut it, they all sighed in surprise. Teacher Zhang told the students that this circle is called Mobius circle. A child said, "why is this name so strange and awkward?" I feel a little dizzy. " After explaining that Mobius was a mathematician, the students were stunned. Teacher Zhang said with a smile: "Learning is a process from fainting to not fainting."
This class also gave birth to "Ou Ziran Circle", because he reversed it twice when posting it backwards and cut out two covered circles. Through this circle, Mobius circle law was discovered. Teacher Zhang said: "Dare to guess, dare to try and dare to think differently. You may be the next mathematician. " Look at the three sentences he often says to students, and you will feel that he is not only a math teacher, but also an educator.
He said that education is life and life is education. Taking advantage of the temptation of delicious food, he designed the course "Fractions on the Tip of the Tongue", which fully mobilized students' vision, taste and thinking, and talked about the meaning, expression, size and number of fractions, even after class. For example, Mr. Zhang solved the knowledge of number recognition, addition and subtraction, RMB conversion and so on in the first grade by opening a supermarket, and encouraged children's classroom behavior norms and homework completion by lottery, which paved the way for understanding probability statistics in the future. In particular, the combination of 5 and 10 is for children to understand with examples in life. For example, Teacher Zhang dances peacock dance to help him remember the number and combination of 5. It must be interesting to think about that charming photo.
Knowledge is secondary, and Teacher Zhang pays more attention to the cultivation of logical thinking. When teaching the volume of cones, he led the students to the playground and asked them to pile up sand piles with cones of different sizes and heights, and then thought about why these sand piles could stand up. Finally, draw a magical angle of 5 1 degree.
Mathematics, in my past experience, is to keep calculating, boring to learn geometry, functions and so on I don't think it's useful to learn math except to buy things. But teacher Zhang's report subverted my understanding of mathematics for decades and showed me the other side of mathematics. Let me understand that mathematics really comes from life and serves life.
Your charm deeply touched me, but I know this is the power of knowledge!