## 5 Conclusions and Future Work  
This study has put forth a teaching system based on a virtual chemistry laboratory, which makes use of AR technology to implement virtual chemistry experimental teaching. The proposed teaching system framework is divided into two parts, namely, physical teaching materials and virtual experiment application. The physical teaching materials include all devices needed for the virtual chemistry experiments. Users may choose the required experimental cards according to the experimental units, in lieu of actual chemistry experimental equipment and consumable materials. The AR technology-based virtual experiment application is to conduct experiments, which are part of the curriculum objectives, \begin{table}
\begin{tabular}{c l c} \hline \hline
**No.** & **Item Content** & **Median** & **No. of People** \\ \hline \multirow{2}{*}{1} & I think the AR-based teaching method is in line with the objectives of the current & \multirow{2}{*}{4} & \multirow{2}{*}{8} \\  & curriculum design. & & \\ \hline \multirow{2}{*}{2} & I think the number of times students are actually conducting experiments is not & \multirow{2}{*}{4} & \multirow{2}{*}{8} \\  & enough. & & \\ \hline \multirow{2}{*}{3} & I think learning through the AR-based teaching method can increase students’ & \multirow{2}{*}{4} & \multirow{2}{*}{8} \\  & concentration with respect to the curriculum. & & \\ \hline \multirow{2}{*}{4} & I think traditional teaching materials like pictures or videos are enough to enable & \multirow{2}{*}{2} & \multirow{2}{*}{8} \\  & students to understand [natural science] knowledge. & & \\ \hline \multirow{2}{*}{5} & I think using the AR-based teaching method can enhance students’ learning outcomes. & \multirow{2}{*}{4} & \multirow{2}{*}{8} \\  & & & \\ \hline \multirow{2}{*}{6} & I think the AR-based teaching method is much safer compared with traditional & \multirow{2}{*}{4} & \multirow{2}{*}{8} \\  & experiments. & & \\ \hline \multirow{2}{*}{7} & I think the AR teaching method can shorten my lesson preparation time. & \multirow{2}{*}{4} & \multirow{2}{*}{8} \\  & & \\ \hline \multirow{2}{*}{8} & I think the AR-based teaching method can strengthen students’ learning motivation. & \multirow{2}{*}{4} & \multirow{2}{*}{8} \\  & & \\ \hline \multirow{2}{*}{9} & I will incorporate the AR-based teaching method in my teaching plan. & \multirow{2}{*}{4} & \multirow{2}{*}{8} \\  & & \\ \hline \multirow{2}{*}{10} & I think the effects of AR-based teaching method are better than those of traditional & \multirow{2}{*}{3} & \multirow{2}{*}{8} \\  & teaching materials. & & \\ \hline \multirow{2}{*}{11} & I am willing to use AR-based teaching method in my class. & \multirow{2}{*}{4} & \multirow{2}{*}{8} \\  & & \\ \hline \multirow{2}{*}{12} & I think the AR-based teaching method can present different teaching methods. & \multirow{2}{*}{5} & \multirow{2}{*}{8} \\  & & \\ \hline \multirow{2}{*}{13} & I think the AR-based teaching method is helpful to teachers in more effectively & \multirow{2}{*}{4} & \multirow{2}{*}{8} \\  & imparting the content of the curriculum. & & \\ \hline \multirow{2}{*}{14} & I think the AR-based teaching method is simple and clear in operational terms. & \multirow{2}{*}{3.5} & \multirow{2}{*}{8} \\ \hline \hline \end{tabular}
\end{table} 
Table 13: Teacher opinions questionnaire. thereby allowing users to perform virtual experiments through physical teaching materials and smartphones. The experimental results clearly demonstrated that with respect to learning outcomes, the experimental group students' learning effectiveness reached a significant difference when compared to the control group, indicating that the AR-based teaching method can effectively enhance student performance. With respect to the survey on satisfaction, students in general showed high levels of satisfaction, thereby concluding that AR is helpful in strengthening students' learning motivation.