In this study, the purpose is to investigate what kind of interface in interactive contents on computers has higher usability. For the investigaton, the sample material for education that has contents that are taught in this college used. Two interactive contents were built with Flash, which have different interface respectively. The usability of each contents were evaluated by 26 people from the 5 points of view.
The result revealed that the interective contents which feature the following things have higher usability:
(1) the interface which has small number of buttons which are big and easy to see, and,
(2) the interface which has small number of steps of oparation like "drag & drop".