1. school system data: the school management system includes data such as students, teachers, courses, grades and attendance. These data can be used for the analysis and mining of educational big data.

2. Online education platform data: With the development of online education, more and more students and teachers use online education platforms. Learning records, user behavior data and interactive data on these platforms can be used for the analysis of educational big data.

3. Internet data: The Internet contains a huge amount of education-related data, such as academic papers, educational news, teaching materials, course videos and online resources. These data can be used for the mining and analysis of educational big data.

4. Social media data: Data on social media can reflect students' emotions, interests and social relationships. These data can be used for the analysis and mining of educational big data.

5. Mobile device data: Mobile devices include students' behavior data, location data, social data, etc. These data can be used for the analysis and mining of educational big data.

6. Sensor data: Sensors are also widely used in the field of education, such as smart classrooms and smart campuses. The data generated by these devices can be used for the analysis and application of educational big data. To sum up, the sources of education big data include school system data, online education platform data, Internet data, social media data, mobile device data and sensor data.