1, students' academic ability and course difficulty: the difficulty of internal factors in the course will directly affect students' academic ability. If the course is too difficult, students may not fully understand and master the knowledge points, thus affecting their academic ability. Similarly, students' academic ability will also affect their understanding and mastery of the course.

2. Teachers' teaching ability and curriculum design: Teachers' teaching ability will affect their curriculum design and implementation. An excellent teacher can make the course more interesting and vivid, thus improving students' interest and learning effect.

3. Socio-economic environment and educational resources: External factors such as socio-economic environment will also affect the internal factors of the curriculum, such as the educational resources of the school. In some areas with poor socio-economic conditions, schools may lack necessary educational resources, such as excellent teaching materials and equipment, thus affecting students' learning effect.