Although the class time and theme have been declared by individuals according to the teaching progress as early as the beginning of each semester, they are then determined in the group. However, before the last class, the specific teaching content and classroom activities will be influenced and acted by many factors at any time.
Taking "Mathematics in Marathon" taught by Hua Qin in the afternoon of April 9, 2009 at the famous backbone teachers' classroom teaching exhibition in the whole region and the joint teaching and research activities of Gulou and Qixia famous teachers' studios as an example, it has brought us many inspirations.
The embodiment of subject characteristics.
Mathematics originates from life and is higher than life. Therefore, in the classroom learning of mathematics, we should firmly grasp the characteristics of this subject, start with the familiar life situation of students, and build a mathematical model through abstraction and reasoning.
The mathematics of marathon is based on this understanding. Starting from the annual Nanjing Xianlin Half Marathon, a young athlete Ma asked, "Why does the same distance take different time?" Firstly, the influence of wind on walking speed is discussed, and then the influence of stroke on people's walking speed in marathon is transferred to the influence of water flow on canoeing speed in another race. By comparing their effects on speed, a preliminary mathematical model is constructed, that is, downwind (current) speed = windless (still water) speed+wind (current) speed; Headwind (current) speed = windless (still water) speed-wind (current) speed.
Finally, the influence of wind on speed is extended to the influence of wind on navigation speed to supplement and perfect the existing quantitative relationship. At the same time, it also provides some preliminary guidance for students to continue their research on this topic after class.
The Nanjing Xianlin Half Marathon used in this lesson is not only a familiar life situation for students, but also an effective carrier to help students understand the basic quantitative relations such as water flow.
This is the embodiment of the characteristics of mathematics in classroom learning.
The pursuit of characteristic courses.
As a characteristic school-based course, the district-level demonstration course of "Mathematical Stories" should not only have the characteristics of mathematics, but also reflect the pursuit of the characteristic course of "Mathematical Stories"-learning mathematics in stories and telling stories better through mathematics.
"Marathon Mathematics" focuses on the problem of the horse of Nanjing Xianlin Half Marathon, and explores the influence of "wind" and "water flow" on speed, so that students can apply their mathematical knowledge and feel the connection between mathematics and sports and life while helping their classmates solve problems. In the narrative of "story", all kinds of actions are told with the same quantitative relationship and the same law, which shows that there are stories in life and mathematics in stories.
The story begins with the marathon and ends with the marathon, and ends the inquiry journey of mathematics in the selection and analysis of physical education class or mathematics class.
Enlightenment of school-based research.
Teacher Hua Qin talked about the influence of school-based research activities on this exhibition in the after-class discussion.
First, the determination of mathematical content.
The mathematics content of "Mathematics in Marathon" course originates from the open class of teachers in the group-"Running Water Problem", which is an expansion and extension on the basis of Qi's original design. It aims to help students exercise logical thinking and improve their ability to solve problems through understanding and applying the quantitative relationship of a class of problems.
Second: the determination of the story content.
The story content of marathon mathematics comes from the problem of running water after the extension of Nanjing Xianlin Half Marathon. This is Xianlin people's own activities, but also Xianlin people's own festivals. Therefore, it is more appropriate to tell stories.
Third, the determination of activity level.
Finally, because the mathematics knowledge used in this class is intrinsically related to the third unit of the fourth grade mathematics textbook, it is decided to carry out learning activities in the fourth grade.
Therefore, mathematics plays a very important role in the formation of marathon and the weekly school-based research activities.
? "Mathematics in Marathon" is like this, so are more open classes. Because taking class as an example, it is the significance and value of school-based research to pursue and realize the effectiveness and efficiency of teaching, the construction and optimization of courses and the cultivation and promotion of literacy. Therefore, every school-based training contains opportunities and possibilities for improvement, whether for classroom participants or participants. We saw Mr. Hua Qin's mathematics in the marathon and were inspired by him.