Sozo Gakuen Co., Ltd. started interactive online classes on a trial basis using a web conference tool, but after it was announced at the end of February that schools would be closed due to measures to prevent COVID-19 infections, they put the effort in full scale. They immediately tried to go online in all classes. Although it was a process of trial and error, it has been well received by both students and parents, and other schools in Gakken Group have adopted this know-how and provided substantial learning opportunities at home.