## 3 Results and Discussion
### Teaching Satisfaction Evaluation  
The students' satisfaction with the teaching methods in the ability training is divided into \"very satisfied (10 points)\", \"satisfied (8 points)\", \"general (6 points)\", \"relatively dissatisfied (4 points)\" and \"very dissatisfied (2 points)\". The content of the teaching-methods satisfaction survey includes \"Knowledge mastering effect\", \"Improving learning enthusiasm\", \"Hands-on ability\", \"Self-learning ability\", \"Analyzing and problem-solving skills\", \"Communication and cooperation ability\" and \"Overall evaluation of teaching satisfaction\". The results are shown in Figure 8.  
From the evaluation of the overall evaluation of teaching effect, 20% of the students in the control group were \"satisfied\" with the traditional teaching method, 70% of the students thought that the teaching effect was \"general\", and 10% of the students felt \"less satisfied\". In the experimental group, 20% of the students felt \"very satisfied\" with VR teaching, 70% felt \"satisfactory\", and the remaining 20% considered VR teaching to be \"general.\" From the perspective of hierarchical scores, the average satisfaction of the control group on the overall effect of teaching is at the \"general\" level, while that of the experimental group is higher than the level of \"satisfied\". The experimental group gave higher satisfaction to the overall teaching effect.  
In the process of achieving specific teaching objectives, students showed no significant difference in the satisfaction of the two methods in helping them master knowledge, or improve their self-learning, communication and cooperation ability. As was analyzed in the previous section, VR teaching has no obvious advantage in mastering the memory of theoretical knowledge. In terms of their self-learning ability, the reasons for the similar satisfaction of the two groups are different. According to the experimental observation and post experimental interviews, the control group believes that the self-learning ability through traditional teaching in the classroom is not enough for the students to master  
Figure 8: Teaching satisfaction evaluation results: (**a**) overall evaluation of teaching satisfaction; (**b**) satisfaction evaluation of teaching goal achievement.  
the knowledge and that it is necessary to self-study after class, thus indirectly cultivating the self-learning ability. The experimental group students believe that the students in VR teaching have complete autonomy and grasp the teaching rhythm in the virtual world, thus cultivating and training self-learning ability.  
In terms of improving learning enthusiasm and cultivating hands-on practical ability, the experimental group was more satisfied than the control group who had traditional teaching, both of which were \"relatively satisfied\" and \"very satisfied\". Through the use of VR devices, the experimental group students independently explored the construction teaching content, which has a strong sense of immersion and participation. This not only improves the enthusiasm for the construction course, but also enriches the practical ability in laying waterproof rolls.