Insufficient covering of curriculum contents to secure safe bicycle driving may increase the possibility for children to be involved in accidents. Any bicycle riding parents would be able to instruct, in one sense, some of the items shown in Fig.3-5 based on their own experiences, for example, “2. Can perform riding operations” and “3. Can ride a bicycle in accordance with traffic rules”. However, only a few can deliver conscious instructions on the item “1. Can take a comfortable posture”. Further, even fewer parents would imagine themselves teaching the issue “4. Can ride a bicycle without causing accidents.” Translating these situations into VT indicates that