Fig. 9
From: An integrated practice system for learning programming in Python: design and evaluation
Average usage of smart content types for students in clusters mix, animations, and problems (N=336). The y-axis shows the average of students’ attempts on the smart content types, and the x-axis shows 2-week intervals of the course. Each point in the above plots represents the average of student attempts during the corresponding weeks in the course. Error bars represent standard error from the mean