First, the teaching objectives
1. Know the new words in this lesson 12. Correctly read and write the words "dinosaur, fierce, light, agile, irrelevant, different shapes, eating like a bird, no doubt".
2. Read the text correctly, fluently and emotionally, experience the accurate and vivid language features, and recite the paragraphs that interest you.
3. Practice retelling the evolution process of dinosaurs flying into the blue sky in an orderly way, and stimulate a strong interest in loving science, learning science and exploring knowledge.
Second, the difficulties in teaching
1. key point: understand the content of the text and understand the evolution process of dinosaurs flying to the blue sky.
2. Difficulties: Understand the author's expression and the accuracy of the author's words.
Third, teaching preparation.
multimedia courseware
Fourth, the schedule:
2 class hours
first kind
First, dialogue import:
1, PPT shows dinosaur pictures
2. Students, look, who did the teacher invite to our class today? Who can tell me how much you know about this creature? How do you know that?
Default value:
During your research trip, you visited the Wangwushan National Geopark Museum and saw the dinosaur statue. You have benefited a lot from your study trip.
You watched the cartoon "Dinosaur World" and learned that dinosaurs controlled the earth for 65.438+0.6 billion years. You are very good at learning!
What I recommend to you is DK Children's Dinosaur Encyclopedia, OK! Books are the ladder of human progress. You have made great progress!
3. Question: Does anyone know the origin of dinosaur names? The teacher showed the information and introduced it.
British paleontologist richard owen (1804- 1892) found that Iguanodon, Megalodon and Lin Long were huge and had columnar legs, but when they walked, their bellies clung to the ground and crawled forward, so they were given a new name, dinosaur English ['dans] ". Scientists in China simply translated it as "dinosaur". Let's write its name together.
The text we are going to learn today is lesson 365438. What's the topic? Who wants to read it to everyone? I heard a question from your reading; I heard a surprise from his reading. What the hell is going on? Let's go into the study of the text together!
Second, check self-study
1, PPT shows two sets of words:
Light, agile, colorful, light, soaring, favored by heaven.
A huge family that is clumsy, slow, greedy, bloody, diverse and fierce.
2. Dialogue: Please read the two groups of words in the text freely and imagine the picture while reading.
3. Read by roll call and communicate with the whole class. After reading the first group of words, what kind of creatures come to mind? Read the second set of words?
4. What is the close relationship between two seemingly unrelated creatures, one in the sky and the other on the ground?
Third, summarize the full text.
1, "Without bold speculation, there will be no great discovery." The great scientist Newton once said this. Scientists have studied a large number of fossils, and what conclusions have they guessed?
2. Read the text freely, find out the scientist's speculation, draw a conclusion and read it several times.
Scientists after a lot of research, the conclusion is:
3. Show the central sentence and comparative sentence on the slide to understand the accuracy of the author's expression.
During the Mesozoic era, a branch of dinosaurs finally became a soaring bird after a long evolution.
In Mesozoic, dinosaurs evolved into birds.
Fourth, learn to repeat.
(A) the overall perception
1, dialogue: How did dinosaurs fly into the blue sky? Let's close our eyes, listen to music, travel through just visiting, visit the Mesozoic earth and see the evolution of dinosaurs!
2. Listen to the text and read it aloud.
Children who can read can shorten long reading. Please read the fourth paragraph of the text carefully. After reading it, think about what this paragraph says.
4. Communicate with the whole class.
(2) Fill in the form
1, group cooperation
leave out
2. It is difficult to question.
(C) repetition of learning
1, retell the first dinosaur.
Speak; The first dinosaur appeared about 230 million years ago, which is too far away from us. After listening to his retelling, can you imagine what it looks like? How did you come up with it? (Learn to compare and introduce things)
2. Retell the dinosaur families with different shapes.
This sentence is so long! What words make you feel that the dinosaur family is huge and the dinosaur family has different shapes? (Classification for comparison)
Practice expression: If you are a member of this huge family, how do you introduce yourself? Please try to say it.
3. Retell the physical changes of some carnivorous dinosaurs.
Question: Can a huge dinosaur family fly into the beautiful blue sky? Let's read the fourth sentence describing carnivorous dinosaurs over and over again and tell us what happened to their bodies. Look at the picture and say it.
4. Retell how dinosaurs learned to fly.
Dialogue: Like a bird, it may not be able to fly into the blue sky. Only with the ability to fly, is a real bird. How did dinosaurs have the ability to fly? Scientists have made several speculations. Talk to each other at the same table. Speak and act in your own words.
Students, look at the table and say again in your own words how scientists speculated about the process of dinosaurs flying into the blue sky.
Verb (abbreviation of verb) course summary
1, what a long and wonderful process dinosaurs flew into the blue sky! What did you gain from your study?
According to the teacher, so far, the historical process of how dinosaurs evolved into birds can't be reproduced in front of us, but scientists all over the world are still working hard to reproduce this historical process. If you also love science and study hard, maybe our fourth-grade students will realize this wish, and the teacher is looking forward to it …