The aim of this project is to build software development environments for teachers, enabling them to produce their own educational applications for their classrooms as easily as they might produce educational materials using a word processor. As one means of realizing this goal, the authors proposed a componentware methodology, and developed 15 components and three application programs for English as a Foreign Language (ESL), and presented the results (at ED-MEDIA 2002). They have continued researching componentware methodologies, and have created a wide variety of new components, categorizing these components into two main groups: basic components and high-level components. Basic components allow teachers to develop complicated CALL applications with a few simple programming statements. High-level components are, for example, independent applications not requiring any additional coding tasks. This paper discusses: the background of the project; advantages of componentware methodology; past results; basic components and high-level components; example applications made using these components; and related issues. (Author)