1. Individual differences, also known as individual differences and personality differences, refer to "psychological and physiological characteristics that are relatively stable and different from others in the process of psychological activities such as cognition, emotion and will", which are characterized by "quality and quantity". "Qualitative differences refer to differences in psychological and physiological characteristics and behaviors, while quantitative differences refer to the speed and level of development".

2. Significance: It is the requirement of the new curriculum standard to fully understand students, discover their uniqueness, confirm their interests and talents at different levels, and create a teaching environment conducive to students' different intellectual performances. Teachers should actively face all students, admit personality differences and encourage personality development. We should know that education with individuality and education with respect for individuality is a successful education.