As an important research and application area of artificial intelligence (AI), intelligent tutoring system (ITS) is the natural direction for human digital education in 21st century.

• 智能教学系统 ( intelligent tutoring system；ITS) ；作为人工智能学科的重要研究应用领域 ；是 2 1世纪人类社会数字化教育的必然发展方向 ；迄今研究逾 3 0年 .