This paper discusses the limitations of the idea of “Standard teaching materials” proposed by Minoru Koshimizu in 1967 and its significance in the same period. “Standard teaching materials” played a complementary role to the “Standard teaching process” advocated by Koshimizu in 1965, and it was important to make teaching materials and research on teaching materials that could be used in the “Standard teaching process.” In the “Standard instructional process,” the goal was “value goals,” which were found in the meaning of the whole text, the purpose of the child’s reading. Therefore, finding the meaning of the whole text and the value goal was considered to be the research of teaching materials. Researching teaching materials with a predetermined teaching process does not lead to the formation of teacher competence or the development of children’s reading. However, the “Standard teaching process,” which lays out the goals and teaching points, was designed for teachers who were not competent, and was designed to ensure that children would be able to read the meaning of the whole text, and the “Standard teaching materials” were a way to achieve this. While the advocacy of “Standard materials” reinforced the trend in the 1960s to require accurate reading, it also contributed to the formation of a foundation for reading instruction that requires the development of the elementary language skill of reading the overall meaning of a text.