In order to solve the problem that students fail to complete experiments on time in class and are lack of learning enthusiasm and initiative outside class in the teaching process for principles of computer composition,course group selects Logisim as the experimental platform,and use various teaching methods in class,with the help of online learning resources.Some other measures are also carried out to encourage and guide students for self-learning,by decomposing the tasks of experimental case into out-class,and introducing new assessment methods. Teaching practice results show that taking advantage of synergy between inside and outside class is good for promoting students’ practical ability and self-learning ability.