This lesson is based on the fact that students have learned the counting, reading and writing of numbers within 100, and gradually understood the meaning of cardinality and ordinal number, so that students can compare the sizes of numbers within 100 and feel the law of numbers initially. Developing students' sense of numbers is an important goal of curriculum standards. Due to the limitation of age, primary school students' figurative thinking is dominant, and their abstract logical thinking ability is relatively poor. Therefore, for students, abstractly comparing the numbers within 100 is the teaching focus and the teaching difficulty of this class. In teaching, I teach in connection with students' real life, so that students can explore and communicate collectively.
Through this lesson, students can compare the size of two numbers within 100, laying a foundation for students to master the relationship between numbers in specific situations, which is an important content to cultivate students' sense of numbers. Although students have compared the size of numbers within 20, they can use symbols to represent the size, but it is difficult to compare the size of numbers in an abstract way.
Therefore, I create concrete, vivid and interesting scenes according to the age characteristics of students and their familiar life experiences, so that students can perceive the size of two numbers. In the gradual transition to the comparison with the help of counters, we can finally compare numbers abstractly and cultivate students' spirit of independent exploration.