Abstract
This paper introduces an implementation of a compulsory course, ``Digital Signal Processing I,'' in a blended learning style. This subject is delivered by two lecturers as weekly parallel classes using the same e-learning contents including online quizzes for weekly homework. This sophomore-level basic course is compulsory for all the students of the Department of Computer Science and Electrical Engineering, Kumamoto University. The course has been assessed over several years from the students' activities on an e-learning system and the final record of this course as well as a questionnaire-based survey. The averages of the total grades for both classes are almost the same and the distributions of the evaluation scores have a similar pattern. These tendencies suggest the usefulness of the teaching style for maintaining the equivalence of the subject provided in parallel classes by different lecturers.