Consequential reasoning relevant to moral development has not been effectively practised in elementary schools in Taiwan. The present study designed a "To Do or Not To Do" website for students to explore moral dilemma situations and exercise consequence-based moral reasoning. Effective data from 160 fifth-grade students were collected for a confirmatory factor analysis and subjected to structural equation modeling (SEM). The results indicated that with a higher perceived level of parental monitoring; the participants had a higher level of pro-social tendency and a lower level of impulsivity. In addition, a lower level of impulsivity was significantly associated with a greater interest in blended learning to practice moral consequential reasoning. The results suggest that teachers could use the To Do or Not To Do website as part of a flipped classroom for students to practice moral consequential reasoning to maximize the moral development of less impulsive students.