Describe the benefits of using single-subject designs (SSD) and action research (AR) in a classroom as a practitioner. Give an example of what you might do using SSD and AR to solve a particular recurring problem that you are seeing. Describe the benefits of using single-subject designs (SSD) and action research (AR) in a classroom as a practitioner. Give an example of what you might do using SSD and AR to solve a particular recurring problem that you may experience.