Abstract
The purpose of the present study was to convert PC-based English CALL systems developed by Chiba University to smartphone-based systems in order to enlarge the learners' learning environment. The programs by Flash were carefully designed and created considering processing capability, access speed, memory space, battery duration, the size of the screen, amount of information presented in one page, and the user interface such as the sizes and designs of the pictogram buttons. A total number of 16 CALL systems for improving English listening skills and 15 systems for vocabulary learning were developed. The result showed that approximately 90% of the functions available to the previously developed PC-based systems were successfully converted to the smartphone-based CALL systems. An experimental use of the systems by 23 learners also showed the high usability and practicality of the new systems.
