In the second volume of senior one, students have learned to determine the position of objects according to the ranks in specific situations, learned the position and direction of the second volume of senior four, and further understood that the position of objects can be determined by two conditions in the plane. On this basis, let students learn to use number pairs to represent the position of objects in specific situations and use number pairs to determine the position on grid paper, further improve the existing experience, cultivate the concept of space, and lay the foundation for learning the content of plane rectangular coordinate system.
Second, the analysis of speaking and learning.
Students have simple abstract thinking ability, expressive ability and good attention, and are keen to participate in mysterious and challenging activities. According to the analysis of teaching materials and learning situation, the following teaching objectives are formulated.
Third, talk about teaching objectives.
1, knowledge and skills: ① Let students learn to explore the method of determining the position in a specific situation, make clear that the columns are vertical and the rows are horizontal, and can use numbers to represent the position of objects in a specific situation. (2) Several pairs can be used to determine the position on the grid paper.
2. Process and method: Let students go through the process from specific situation to planning, improve their abstract thinking ability, establish the concept of space, and initially infiltrate the idea of combining numbers with shapes.
3. Emotional attitude and values: Let students experience the connection between mathematics and life and appreciate the value of mathematics.
Fourthly, talk about the key points and difficulties in teaching.
The method of expressing the position of an object with number pairs is the focus of this lesson.
It is difficult to determine the position of an object on several pairs of square paper.
Teaching aid preparation:
I prepared courseware, seat number and grid paper for this class.
Verb (abbreviation of verb) oral teaching method and learning method
(A) Analysis of teaching methods
According to the characteristics of teaching content and students' thinking, I chose the following teaching methods:
(1) interpretation method
(2) Situational teaching method
Through a series of situation designs related to students' life, it not only embodies the mathematics in life, but also serves our teaching activities better.
(3) Appreciation incentive method
(4) Practice step by step and give timely feedback.
Through the close combination of study and practice, it not only highlights the teaching focus of this course, but also helps students consolidate new knowledge.
(B) Analysis of learning methods
Pay attention to guiding students (1) to explore independently and cooperate and communicate in teaching.
(2) Learn the methods of observation, comparison and discovery.
In comparison, students find something and get the progress and development of thinking.
Sixth, the design of teaching program.
(1) Game import
At the beginning of the class, I asked the students to introduce their classmate's position and guess who he was, which effectively aroused the students' existing experience in determining the position and helped them find the connection point between old and new knowledge, thus causing students to learn and explore new methods and leading to the topic "position" and blackboard writing.
(2) Explore new knowledge
1, understanding columns and rows
Combined with the specific situation-the seats in the classroom, let the students know the rules about columns and rows through my explanation (blackboard writing: vertical row-column, horizontal row-row), and let the students use which columns and rows to represent their classmates' positions, and then consolidate new knowledge by saying the positions of good friends.
2. Know how to use number pairs to determine the position of objects. (Courseware shows P2 case 1)
(1) Observing and comparing the similarity of each student's position, the students found that they all used "column, row and head", and each position used two numbers, so they asked questions. Can you express their position in a more concise way? Let the students explore independently and discuss and communicate in groups. Students' writing methods are as follows: for example, column A, line B, a/b, ab…… I will show the students' writing methods one by one.
(2) Next, I will explain the method of using number pairs to express position, and introduce its writing and reading. Students practice immediately. (Number pairs on the blackboard)
The above process allows students to experience the process of abstraction and symbolization from text description to symbolic expression, from complex to simple.
(3) Interactive games. Show two seat cards (2, 3)(3, 2) Q: Is it the same position? Let the students think and guess first, and then check by name. At the same time, find out which two students in the class belong to these two cards.
Compare the differences between (2,3) and (3,2), and let the students understand the importance of the order of two numbers in a number pair.
(4) Exercise: Illustrate the position in life with examples and talk about the method of determining the position.
Through the creation of situation, the teacher's explanation, the students' comparison and practice, the key points of this class are well solved, the students' existing experience is improved and their spatial concept is developed.
3. I use the method of appreciating and stimulating interest-courseware to show pictures related to location, so that students can experience the connection between mathematics and life and stimulate their enthusiasm for after-class exploration.
4. Example 2
It is difficult to determine the position with several pairs on the square paper. The students in front are all studying the specific situation. In order not to make the students appear abrupt, I use the seat map to connect the specific situation with the plan. And the name is fixed at the intersection of horizontal and vertical lines. "How many students want to know everyone? Where are their positions? " Familiarize students with grid maps. Finally, I invite you to play in the zoo and send a picture of the zoo specially. (Courseware display) Let students learn to determine the specific position on the grid paper. By creating a scene for students to refine mathematical information and discover mathematical laws, it not only breaks through the difficulties, but also stimulates their interest in learning.
Guide students to discover the characteristics of (1, 4) (6, 4). Think about it: if you are
(6, 1), What are the characteristics of Tiger Hall and Aquarium? Help students feel the concept of combining numbers and shapes.
(3) Summary: This lesson explores the method of determining the position in specific situations, so that students can clearly indicate the position of objects in specific situations with number pairs, and can determine the position with number pairs on grid paper.
Consolidation and promotion (courseware display)
1. Practice the chess on page 4 of the textbook. Q: Can you tell me the location of each piece?
Complete question 4 on page 5 of the textbook. Requirements: Mark the position of each point in the drawing.
(E) Thinking expansion
Passionate creation: By connecting and adding position points, students are encouraged to create patterns, which not only consolidates knowledge, but also disperses students' thinking, and ends this lesson in the activity.
Teaching reflection:
In this class, I can make full use of students' existing life experience and knowledge, and start with the familiar seating order, so that students can subtly establish the concept of "which column and which line" in the practice of dictation, and cultivate the habit of saying "column" first and then "line" from habit. Then use the grid diagram to show the position, so that students can know how to find the corresponding position from the grid coordinates. This is from intuition to abstraction, from easy to difficult, in line with children's learning characteristics. The design of this link is to let students inspire each other and develop together in interaction.