Online decision-making, learning analysis and data mining. It is mentioned in the definition of educational big data that educational big data needs three supporting factors: online decision-making, learning analysis and data mining, so the three elements of educational big data are online decision-making, learning analysis and data mining. Big data, or huge amount of data, refers to information that involves so much data that mainstream software tools can't capture, manage, process and arrange it in a reasonable time to help enterprises make more active business decisions.