1, knowledge reserve: Before learning the area of parallelogram, students have mastered the characteristics of rectangles and squares and their perimeter calculation methods. In addition, students have a preliminary understanding of the characteristics of parallelogram and trapezoid. These knowledge reserves laid the foundation for learning the area of parallelogram.

2. Experience accumulation: When learning the area of parallelogram, students have already had some measurement experience, such as using the method of counting squares when exploring the area calculation method of rectangle. In addition, students have been exposed to the idea of "transformation", which may not be deep enough, but it is beneficial to explore the area calculation method of parallelogram.

3. Grade and ability: Grade five students are in a period of transition from thinking in images to thinking in logic, and they already have certain spatial concepts and logical thinking ability. However, it may still be difficult for them to understand the formula derivation of graphic area calculation and describe the derivation process.

4. Teaching materials and teaching methods: In terms of teaching materials, students learned the characteristics of parallelogram and trapezoid, which provided an intuitive image cognition for learning the area of parallelogram. In teaching methods, teachers can adopt intuitive demonstration, cooperative communication and other ways. Guide students to explore the problem, through emotional rendering of the teaching environment, using the situation to lead to the problem, and through guessing, verifying and deducing the area calculation formula of parallelogram.

Function of parallelogram area:

1. The main function of the parallelogram area is to know the base and height of the parallelogram, so that the area of the parallelogram can be directly calculated. This is very useful for application scenarios that need to measure and calculate areas of various shapes and sizes. For example, in the agricultural field, the area of cultivated land can be calculated by measuring the area of parallelogram, so as to determine the number of seeds needed for planting crops. In the field of architecture, the parallelogram area can be used to calculate the area of the wall to be painted, and it can also be used to calculate the laying area of the floor.

2. The calculation of parallelogram area can also help students better understand and master the basic concepts and calculation methods in geometry, thus cultivating students' mathematical thinking and logical analysis ability. In mathematics teaching, teachers can guide students to master the laws and methods of graphic area calculation step by step through the calculation of parallelogram area, so as to improve students' mathematical literacy and problem-solving ability.

3. The calculation of parallelogram area often appears in daily life and practical application. For example, urban planning and traffic layout need to calculate the area of streets, parks, squares and other venues.

In agricultural production and food processing, it is necessary to calculate the area of fields, orchards and vegetable gardens; In the commercial and financial fields, the calculation of parallelogram area often occurs, such as calculating land area and evaluating asset value. Therefore, mastering the calculation method of parallelogram area is of great significance to people's life and work.