URL：https://www.researchgate.net/profile/Hans-Van-Der-Mars/publication/272092124/figure/fig5/AS:614147825889302@1523435660791/Traditional-layup-drill-still-commonly-used-today-characterized-by-waiting-in-lines_Q640.jpg
掲載元：https://www.researchgate.net/figure/The-teaching-games-for-understanding-model-Bunker-Thorpe-1982-Thorpe-Bunker_fig3_272092124
