Difficulty-Based Knowledge Point Clustering Algorithm Using Students’ Multi-Interactive Behaviors in Online Learning

Table 2

Knowledge point difficulty classification of learners at different cognitive levels.

	Classification by difficult (K = 3)
	Number of learners	Knowledge point name	Number of knowledge points
Primary	69	: circular queue in data structure, : enqueue and dequeue, and : special binary tree, …	81
Intermediate	171	: deleting priority queue implemented by heap, : pre-order traversal of a tree, and : post-order traversal of a tree, …	74
Advanced	32	: pre-order traversal of a tree, : post-order traversal of a tree, and : storage representation of tree, …	71