Basic properties of ratio 1.

Today, I listened to the lesson "The Basic Nature of Comparison" taught by Teacher Ding. Around the theme of the activity, Mr. Ding pays attention to cultivating students' mathematical thoughts, paying attention to the fact that students are the main body of teaching and teachers are the guides and collaborators of teaching. The teaching method is flexible and the teaching effect is good.

Advantages:

1, the mathematical thought of analogy, the thought of reduction, the review of the basic properties of fractions and the invariance of division quotient at the beginning of class, and the change from the simplest fraction to the simplest integer ratio in teaching are all from the review of old knowledge to the introduction and understanding of new knowledge.

It fully embodies the analogy thought and transformation thought in mathematics, which not only teaches students learning methods, but also improves their learning ability, and the teaching effect is good.

2. Disperse the difficulties in teaching, grasp the key points and break through the difficulties. In classroom teaching, grasp the basic nature of comprehension ratio and use students' reading before class to judge various judgment questions (the multiplication times of the former and the latter are different, and the operation of the former is also different.

No 0, etc. ), fully draw the basic nature of students' comparison. Understanding and effectively establishing the relationship among the basic nature of score, the invariance of quotient and the basic nature of ratio in teaching has dispersed the difficulties in teaching, grasped the key points, broken through the difficulties and achieved good teaching results.

3. The classroom has a large capacity. Teacher Ding's teaching is based on the characteristics of sixth-grade students, and the classroom teaching capacity is large. She regards classroom teaching as an exam to guide students to learn, understand, consolidate and improve in a tense and efficient situation.

Suggestion:

Teaching pays attention to students' understanding of the basic nature of comparison in judgment and the difference between simplification and comparison, but lacks the process of simplification by students themselves. If students are allowed to simplify themselves, they will fully understand and apply the basic nature of ratios.

The Basic Nature of Ratio —— Review of Manuscripts (Ⅱ)

Today, I listened to the lesson "The Basic Nature of Comparison" taught by Teacher Feng. Teacher Feng Wei pays attention to cultivating students' mathematical thoughts around the theme of the activity, paying attention to the fact that students are the main body of teaching and teachers are the guides and collaborators of teaching. The teaching method is flexible and the teaching effect is good.

Advantages:

1, classroom teaching embodies the mathematical thought of analogy, the thought of reduction, and the review of the basic properties and the invariant properties of fractions at the beginning of school, from the simplest fraction to the simplest integer ratio teaching.

From the review of old knowledge to the introduction and understanding of new knowledge, these ideas fully reflect the analogy and transformation in mathematics, which not only teaches students learning methods, but also improves their learning ability, and the teaching effect is good.

2. Disperse the difficulties in teaching, grasp the key points and break through the difficulties. In classroom teaching, grasp the basic nature of comprehension ratio, and use students' reading before class to judge all kinds of judgment questions (the number of multiplication after the previous paragraph is different, the operation after the previous paragraph is different, except those without 0). ) for students to compare.

We have fully understood the basic nature, and effectively established the relationship among the basic nature of score, the invariance of quotient and the basic nature of ratio in teaching, which dispersed the difficulties in teaching, grasped the key points, broke through the difficulties and achieved good teaching results.

3. The classroom has a large capacity. According to the characteristics of sixth-grade students, Mr. Feng's teaching has a large classroom teaching capacity, and takes classroom teaching as an exam to guide students to learn, understand, consolidate and improve in a tense and efficient situation.

Suggestion:

Teaching pays attention to students' understanding of the basic nature of comparison in judgment and the difference between simplification and comparison, but lacks the process of simplification by students themselves. If students are allowed to simplify themselves, they will fully understand and apply the basic nature of ratios.