Abstract
A purpose of this study was to grasp a structure of teachers' expectations for utilizing functions of digital textbooks for learners (DT-L) in order to design in-service teacher training program for diffusion of DT-L. A total of 1,264 elementary and junior high school teachers were surveyed about their expectations for utilizing 25 functions of DT-L, and factor analysis was conducted. As a result, four factors were extracted: F1 "Functions of additional information access and its control," F2 "Functions to improve visibility of contents," F3 "Functions of annotation on textbook," and F4 "Functions of text-to-speech of contents". Between these factors, level of F4 was higher in teachers who had experience using digital textbooks for teachers (DT-T), and level of F2 and F4 was higher in elementary school teachers than in junior high school.