Abstract: Case teaching method is a kind of case-based teaching method. In case teaching, teachers play the role of designer and motivator and encourage students to actively participate in proposing solutions. Case teaching method is not only vivid and specific, but also can help students to apply what they have learned. Students need to flexibly use the theoretical knowledge, methods, tools and processes taught in class to analyze and design until the final completion of the whole case. This paper discusses how to make a good algorithm course, discusses the teaching objectives of the algorithm course, and puts forward the discussion case teaching mode based on COID to improve the teaching effect, as well as some scientific thinking methods consciously permeated in teaching.

Key words: Algorithm, Case teaching, COID