There are 324 dolphins and sea lions in the aquarium, and the number of sea lions is three times that of dolphins. How many dolphins are there in the aquarium? How many children visited the aquarium today?
Extended content:
Knowledge and skills: explore and master the calculation method of multiplying two or three digits by one digit (carry) and calculate it correctly; According to the specific situation, gradually cultivate students' awareness and ability to ask and solve problems. Mathematical thinking: experience observation, selection of mathematical information, estimation, communication and other mathematical activities to develop students' abstract thinking ability.
Problem solving: initially train students to ask and understand problems from the perspective of mathematics, comprehensively apply the knowledge and skills they have learned to solve problems, and cultivate application consciousness. Emotion and attitude: guide students to actively participate in mathematics activities, gain successful experience, and establish self-confidence in learning mathematics well.
Teaching material analysis: "Going to the playground" is the content from page 30 to page 365,438+0 in the third grade of Mathematics (New Century Edition), a standard experimental textbook for compulsory education. Before this lesson, students have mastered the knowledge of oral and written calculation (non-carry) of multiplying two digits by one digit. Therefore, this lesson guides students to master the calculation method of carry multiplication and cultivate them.
In teaching, teachers should attach importance to students' emotional experience, use various forms (such as various forms of exercises and colorful game activities) to arouse students' enthusiasm for learning, pay special attention to students' differences, provide targeted counseling to students with learning difficulties, help them solve their learning difficulties, and establish self-confidence in learning mathematics well.
Our school is a boarding school. When the school is ready to be established, it is also the time when our district, as a national experimental area of basic education curriculum reform, begins to carry out curriculum reform experiments. Now, the third grade students are the first students when the school was founded. Most students come from cities, and a few from rural areas. The student group is relatively balanced. After more than two years' study, students have been able to try to ask, analyze and solve mathematical problems according to their learning contents, and can effectively carry out group cooperative learning.