The aim of this study was to develop a method to teach heat transfer to slow learner students. The study used a single-subject research approach with A-B design (baseline and intervention) in the special need elementary school in Banjarmasin. The subject of this study was three slow learner students. Teaching experimental demonstration methods for explaining heat transfer phenomena (i.e., conduction, convection, and radiation) were done. Teaching process was completed by explaining several laws in physics to students. The teaching process was also done by collaborating between special teachers and regular teachers. The results of the study revealed that subjects requiring cognitive understanding and difficult subjects can be taught to slow learner students. The successful achievement cannot be separated from a collaboration between regular teachers and special teachers. Special teachers play a role in conveying instructions to be simple and concrete. A quiet learning atmosphere in the absence of other audio-visual stimuli, besides experimental media, can make slow learner students more focused. The repetition factor of the subject matter by special teachers during the learning activities is very helpful because the characteristics of the slow learners are more likely to have short-term memories. Keywords: Education, Heat transfer, Radiation, Repetition, Slow learner, Teaching.