Onion Mathematics Micro-course Edition Primary School Mathematics Grade Five Volume II "Addition and subtraction of different denominator fractions"
Design and Instructor: Tianzhen 077 Huang Wenjuan.
Teaching content: 80 pages of mathematics textbook for fifth grade primary school published by Jiangsu Education Publishing House.
Teaching topic: addition and subtraction of fractions with different denominators.
Teaching material analysis:
? The addition and subtraction of fractions with different denominators is the content of Unit 5, Volume 2, Grade 5, Jiangsu Education Press. It is also one of the important contents of Number and Algebra in primary schools. Students learned the addition and subtraction of fractions with the same denominator, as well as the meaning and nature of fractions. At the same time, this part lays a foundation for students to further learn the mixed operation of fractional addition and subtraction.
Analysis of learning situation:
This lesson mainly allows students to experience and explore the addition and subtraction process of different denominator fractions and understand the addition and subtraction operation of different denominator fractions. Judging from the students' preview, most students can find the solution of addition and subtraction of fractions with different denominators, but they can't give a reasonable explanation for their own methods.
Analysis of teaching objectives:
(1) Explore the addition and subtraction methods of different denominator fractions, make students understand the addition and subtraction operations of different denominator fractions by using the migration law, and correctly calculate the addition and subtraction operations of different denominator fractions.
(2) Experience and explore the learning process of different denominator fraction addition and subtraction calculation methods, and feel the idea of "transformation".
(3) Improve students' interest in learning and explore methods and abilities to solve problems.
Teaching focus:
Convert scores of different denominators into scores of the same denominator for calculation.
Teaching difficulties:
Summarize the addition and subtraction rules of different denominator fractions.
Teaching methods:
The teaching object of this class is the fifth grade students. In order to stimulate students' interest in learning, I quoted the animation micro-course of Onion College in this teaching, so that students can more vividly feel the role of addition and subtraction of different denominator fractions in real life.
Studying law:
In the classroom, students can learn and understand the content of this lesson through self-study and independent thinking by watching micro-lessons.
Teaching preparation:
Small onion class, teaching PPT.
Teaching process:
1. scenario import (using PPT)
2. Watch the onion academy video.
3. Practice (learn to check PPT)
Four. Summary (PPT)
Practice in class (PPT).
Reflections on the teaching of intransitive verbs
1. The use of onion micro-class is a new embodiment of the new concept of new curriculum reform under the new curriculum standards. By watching onion micro-video teaching, students' classroom activity is very high, especially the problems in micro-video pause. The method of guiding students to think is particularly novel, and the students have a good response.
2. Changing the learning style "not only reflects independent exploration, but also highlights cooperation and exchange".
3. Highlight the value of education "not only to gain knowledge, but also to experience the process".
The relationship between teachers and students has changed. Teachers are collaborators, guides and participants in students' learning, and teachers and students teach and learn from each other, forming a real "learning body" with each other.