Many thanks to Belinda Rosas for sharing this idea. Belinda is a teacher at TSBVI.
Students with visual impairment often struggle to orient to the scientific talking calculator (Orion TI-36 for example). This simple adaptation allows them to more easily utilize this valuable tool. Place a tactile dot using a hot glue gun on the 5 (central) and on the ( and ). When explaining the dots, let the students know that the dot on the 5 is central to the other numbers (as on a phone). This will help them to orient to the other numbers on the calculator. Students often have a difficult time locating the ( and ) and for this reason they are marked as well.