People are paying more attention these days to developmental disorders. To reinforce this, the Act on Support for Persons with Developmental Disabilities was established in 2005. Over forty students attended the author's class ‘Learning and Developmental Theory’ in the teacher-training course of Muroran Institute of Technology in 2011. The class included learning about developmental disorders. But only being knowledgeable about the disorders may not be sufficient. What was more expected from the students was to obtain the ability to take actions for those with the disorders. As such, the author made several attempts in the class: showing videos to help understanding the disorder, setting group discussions, writing comments to the students’ memos. In the final lecture, many students expressed their willingness to act for those with the disorders.